With any cot, you need a good pad on top of it for insulation. Since you need the pad either way, the cot does give you 2 advantages - it avoids rocks under you and it's easier to get up to pee.
We have a couple of these ALPS cots for llama packing. They weigh 11 lb and fold up more compact than an army type. They're lower, about 8" but you're well above the rocks. They'll fit in a popup tent easier than an army cot.