A question about 2nd/3rd line survivability

[dainbrain]

I had a question regarding kit that has been giving me some problems. I have searched this forum for several days and have been unable to find a definitive answer that my feeble mind can understand. I'm hoping to get some sage advice on the matter from professionals.

I am coming from a civilian hobbyist standpoint.

I have been using ALICE gear for some time now. I run a typical enhanced LBV with a pistol belt, some SAW pouches, couple canteen pouces, butt pack & a Large ALICE ruck.

I have been trying to get some updated MOLLE gear but have been finding it difficult to come up with something that works.

The problem I am finding is that I can't seem to carry enough water/survival kit in my 2nd line. I can't wear a camelback under my ruck so I have to tuck it into my ruck when it's on. If I have to drop my ruck for whatever reason, I feel I have far less ability to survive for several days than I did with my ALICE LBV.

I am seeing all these 'E&E' bags and such that can be detached from your main pack, but to me that doesn't address the possibility that you may have to drop your ruck and not have time to detach an extra pack. With the enhanced LBV, my 2nd line *was* my E&E bag...

I guess what I'm looking for is a good LBV/Ruck combo that is new & fancy but can still allow the modular survivability that ALICE setups have.

I thought that PS.com would be the best place to ask this, I figured that I can't be the only one with this problem.