Need help looking for a bag

I have a few specific requests for a bag - hopefully they can all be met. It will be carrying my Rebel XT with grip, 17-55 with hood, and 70-200 F/4L (also with hood; the hoods can be reversed, it doesn't matter to me). Also, I'd like a laptop compartment for my 15" Macbook Pro, a tripod holder, and room to expand should I get more lenses, or a flash, or whatever else. Now, maybe times I do go mountain biking with my camera (I go slow, but it's still bumpy), and it'd be great if when I do that I can use the laptop compartment to hold a Camelbak bladder. I don't really see a reason why it can't, but all the same, I though I'd ask you guys.

I was looking at the Lowepro Computrekker AW (what's the difference between this and the plus version?), but I feel like that may be a bit too big, especially when I really don't have that much gear to carry. Any other suggestions? I actually just got my Orion Trekker II a few months ago, and I've already almost outgrown it; my stuff barely fits in there.


Thanks!

can anyone help me out here?

By asking to carry the MacBook, you're really defining the size. Your camera gear will fit in a much smaller space, but the computer needs about a 10x14" pocket. So I think that you're going to end up with something the size of the Computrekker or the Kata R-103 unless you decide to carry the laptop separately.

As for carrying a Camelbak bladder - you want a good water-tight seal between the compartment where you put that and your camera gear, or at least I would.

Jon wrote in post #3743788
As for carrying a Camelbak bladder - you want a good water-tight seal between the compartment where you put that and your camera gear, or at least I would.

do you know which (if any) bags have something like this? usually the bladder itself doesn't really get wet on the outside so I don't know if it's really that big of a deal...

EDIT
also, what's the difference between the compurover, computrekker, and computrekker plus? is it just the size of the bag? the compurover looks like the camera compartment is a lot smaller...

I'd think the DryZones. I'm less concerned about having a bladder sweating than I am about having one spring a leak. I use an "Unbottle" on the outside instead.

haha wow, I had no idea that there were bags designed for carrying a bladder! I thought I came up with that idea LOL. thanks for pointing that out!

will I be able to fit my rebel xt with grip connected to my 70-200 in the bag? when I go mountain biking I almost always just use my telephoto to take pictures of other people, and it'd be nice if I could just leave it on my camera rather than switching lenses each time I stop to take pictures...