Cheers for all the responses guys. 
Jon wrote in post #7831265
I've found that I average around 100 or so frames a day while traveling. I don't know how big the files from either of your Nikons are, so I can't really relate 100 frames to GB space; on my 1D3 or 5D, I'd need at least 2 GB per day at that rate. I'd also hold off culling anything other than the most glaringly obvious bad shots unless you have a laptop to view them on (in which case the capacity question becomes moot, since you can always back up some or all your photos to the laptop HDD).
I'm guessing the raw files from the D300 (the one body i'm taking) are roughly the same size as the 1d3 or 5D, seeing as they're roughly the same MP size. Each file is between 18 and 20MB. If 100 frames is 2gb, well, 1gb per day is definitely not going to cut it...
Unfortunately I won't be taking a laptop, so that rules out that idea too. 
Thanks for your input Jon!
tvphotog wrote in post #7831289
For my money, I'd get a Hyperdrive and back up things on it. You'll have a backup and won't have to worry that you may not have enough memory cands.
I've had a look at Hyperdrives, but in Australia they're a little more than i'd want to spend. I forgot to mention the fact i'm on a bit of a budget before leaving. Although, perhaps if I can scrape the money together (or find one cheaper off ebay) i'll pick one up.
hanzers wrote in post #7831355
dont forget to visit bali and lombok

It's funny you mention Lombok actually, i've been doing quite a bit of reading lately and will most definitely be heading there. I've planned 7 of the 35 days to be spent in Lombok...but might extend that out if I truly love it. 
czeglin wrote in post #7831369
I would not consider 1GB/day enough for a day trip inside my country, let alone going abroad. I've found time and time again I always regret deleting pictures based on the LCD preview, even when I zoom in to inspect details.
Look into a cheap netbook or a hyperdrive if you can afford it. If not, I would buy as many memory cards as your budget allows.
At the moment the budget can't quite extend to a Hyperdrive, but I have some friends willing to donate CF cards, so i'll see how many I can scrape together, as well as buy within budget, and hopefully that'll be enough! I do agree after thinking about it a little longer...1gb per day definitely isn't enough.
Wilt wrote in post #7831499
Like Jon, I average about 100 shots per day while on holiday (when photography was ancillary to taking a vacation and playing tourist) Something to consider is how YOU shoot...RAW, or JPG out of the camera? and what that file size happens to average.
As mentioned above, most raw files from the D300 are usually between 18 and 20MB, meaning i'm definitely going to be needing more than 1gb per day.
ed rader wrote in post #7831531
raw with which camera? you know it does make a difference.
in 10 days in africa i shot 56 gigs of raw files with a 10 mp camera. we're going to alaska later this year for a slightly shorter trip and i'm taking 56 gigs plus a netbook and HD for back ups and i'm wondering if i have enough memory....because while i still have the 10 mp camera my main camera is 21 mp.
so....depends on the camera, depends on the person and depends on what you are shooting. i do know in your situation i'd have at least 100 gb and at least one device to store files....and another camera body

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ed rader
Hey Ed, thanks for the input. When I said I was heavy on the trigger, I didn't quite mean as heavy as you...56gb in 10 days is quite a bit! I'll be shooting solely with the 12MP D300, but unfortunately can't quite afford 100 gigs of cards + a storage device...i'll do my best to get there though...
I'm now thinking (or hoping), perhaps 51gb (adding another 8gb card + another 16gb card) will be enough.
condyk wrote in post #7832012
You don't need much memory if you have a back up ... I agree with Wilt as to the solution.
As to having a heavy trigger finger maybe look at how many keepers you get. That is what counts. The less time you have your eye at the viewfinder the more time and attention you can take to find an interesting shot. Personally I would manage on 35gb but I'd have a backup too.
I know what you mean about keepers, and perhaps my lack-of, but I just find it so hard not to take lots of shots, of everything! However, as I said in the first post, quality not quantity, right?
Yohan Pamudji wrote in post #7833458
I shot a little over 1GB/day during a 3-week trip there with a 5D. 5D RAW files are about, what, 12-15MB apiece? All in all I think I was pretty conservative on the trigger too, so I'd vote for more storage if you have a twitchy trigger finger.
I think Ed Rader takes the cake for twitchiest trigger finger, however I think (now, after posting this thread) that i'll definitely pick up another 24gb of CF cards (or more if the budget allow) to make sure I have it all covered.
If worst comes to worst hopefully i'll be able to buy cards over there...
Thanks again for all the help guys. 