[QUOTE=Tinker Mel;975949]My husband has brought one to WDW before with no problems. We found it helpful (at least I did…I’m not the one who had to carry it all day!)
ps…[B]isn’t it Camelbak[/B] (not Camelpak)?[/QUOTE]
yes it is, or at least military issued ones are. I don’t have one with the backpack built in, mine’s desert gear, but I guess those would be more convienant to carry everything + water (or other substance) in.