packs i've tried:
dye attack
ER
Hangar 18
Jacko
dye attack like you said isn't to great for the erm...larger player (not being one of them myself)
ER packs are sweet as anything. Fit pretty much anyone and work proper well...
hangar 18, straps holding pots didn't hold at all when running so a loss of pots. Have been told this is sorted but haven't seen it myself.
Old jacko, like you said not great, but the new ones i have yet to try.
Do what you would do with a gun. Ask someone if you can try if first for a game....easy as...