How long will you be gone?
How big is your media storage card(s)?
If you have a large media card or 2, just use them. Every night, go through and delete the bad shots. If you come close to filling both of them up, buy a card(s) as you need it on your trip.
Otherwise, spend the money to get your Dell Latitude fixed, but depends on how old it is. If it's very old, it might be more cost effective to buy a new one or even a netbook, as suggested. Or get one of those media backup devices, which will take up less room than a laptop/netbook, but may cost about the same.