Prouboy,

Regarding your mattress inquiry....outside of going with a regular 'air mattress' as MT suggested....and that may work for you, the best I've found are the Big Agnes pads.  The Q-Core is 3.5 inches thick and can be had in 20 or 25 inch width, with the 25 only in a 78 inch long version.  They are NOT cheap, but you can shop around.  REI members often get 20% a full priced item and that can significantly reduce the cost, and you can't beat the return policy if it doesn't work out.  Do what you can to try whatever you get out locally before hitting the trail with it.  Maybe you have some close friends that can loan you different styles to try before you buy too?  If you go with the 'big boy', you might look for a hand pump....aka extra large bike tire pump style...lighter than that battery of MT's. 

pd