I would like to get everyone's opinion on what sleeping gear to use. I am planning a trip to Tennessee next May to do Erwin to either Watauga or Demascus and I am trying to figure out what I need for sleeping gear. I would love to get a nice bag but if I find a light weight bag it is way out of my price range and if I get one within my range the weight is going to be 6-9lbs.

At the end of May, would I even need a bag or could I get by with a tarp and a wool blanket. I want to be on the trail for 7-10 days and would like to keep my gear at about 30lbs including food.

My wife is not happy about me doing this (because of some medical problems) so my budget is extremely limited. Any help would be greatly appreciated.