Micro Lite cot
For a few years I've hauling a compact cot on the MC, normal length/width but only 6" off the ground. Weighs about 8# and stores in a bag that's about 26"x8"x2". Nice for old bones and I don't worry about water finding its way into the tent if there is a heavy rain.
One thing to be aware of, if you camp in coldish weather, say overnight lows below 20 degrees, you still need a thermorest or some type of closed cell foam pad on the cot as you will have no insulation under you and lots of air movement.
Jim