Too Much Loot?
If you find yourself packing too much loot (what a terrible problem to have), there's an easy solution: just drop whatever you don't want to hold onto a vehicle, and it will stay there until you want it. Easy.
What To Do About Those Pesky Supply Drop Planes?
Sure, those planes are packed full of supplies that you can really use, but how to get at them? Well, if you have a rocket launcher, just use the lock-on function and let it fly! That plane will take it on the nose, then crash. Supplies will be right by the wreckage.