Whatever you get, make sure it contains insulation. Most inexpensive air beds contain no insulation,and while comfortable, you will become serious;y chilled. Self-inflating types are a good compromise with a filling of open cell foam. The "best" are (probably) down filled giving alot of comfortwith very good insulation. a closed cell foam pad (really inexpensive at under UKP 10) gives good insulation, but not much comfort. As stated elsewhere, placing a CCF pad on top of leaf litter is a good inexpensive system, in wooded areas. you are wild camping in he hills,weight is a big issue, and the CCF is a good option on that score, and if the ground is not too rocky,probably comfortable enough. Although heavier,a self inflating such as Thermarest is a good compromise, and packs smaller than a CCF. COsts about 3-4 times as much though.