Guys, has anyone used the water bladder that comes with the Tenzing 1250 lumbar pack?...I'm new to elk hunting and going on first trip next month to NM (Gila)...I bought this pack and bladder from another retailer before I knew about Elk101 (unfortunate, because I paid more for the pack than the pack and bladder combo on elk101)...anyway, I don't use packs even this smaller size hunting here in TX, so this is new to me...but it seems the way the bladder is made (the "water intake tube" sits on the side of the bladder when used horizontally in the 1250 instead of traditional vertical application in regular packs) that you will only be able to get 1 of the 2 liter capacity out before you are just sucking air...I haven't tested it yet in case I want to return it...any help greatly appreciated...thanks.