When car camping, I have and regularly use a low rise cot. It keeps me 6 to 8 inches off the floor of my tent. Use of a thermarest pad is essential because air circulates below the cot. Even tho the cot fabric is very taught, it does sag ever so slightly and this keeps my thermarest and my body centered in the cot. It keeps me from rolling off the cot and into the tent walls which results in the wrong kind of wet spot. Here is a link to the type of cot I use: http://www.rei.com/product/772536 I have owed two different brands of this type of cot. The first came from REI. It was cheap and I am about 250 lbs. The cot failed on its first use. My second cot came from Sierra Trading. It cost less and is much stronger and has served me very well.