Since building "Bad Mofo in Iraq" and "Jarheads in Iraq," I have become a real fan of stowage sets as really making a kit come alive. You can put these items on the kit from scratch or go with a set and save yourself a lot of time and sometimes wasted effort through trial & error.

The sets that come molded in groups is nice- it gives the stowage a more natural/realistic look than adding one backpack, bedroll, etc. at a time. For exapmle, the Real Models stowage on your AAVP looks great.

Hanging one backpack at a time doesn't look as good without trimming/sanding/putty. Of course you can do a variety. What always gets me is how those things are attached on the real thing. Picking out wheter they use straps, ropes, etc is tough from pictures