So all my asking about closed cell foam pads based on the theoretical unreliable nature of air mattresses must have jinxed me. This weekend, in my tent, maybe 2-3AM I rolled over in my sleep and soon felt something I had never felt using this mat before, the ground. As I came to, I could hear the hissing. Got up, looked on bottom of pad and quickly found a cut 1/8" to 1/4" long. I layed the pad back down, felt on the ground and sure enough, a small/pointy rock right there. It did not cut the floor of the tent just got the pad.
So, like an idiot I didn't bring the repair kit. I always figured if I sprung a leak I wouldn't be able to find it in the field or I could use Leukotape or Duct Tape to fix it. Wrong on both counts. I was able to find it (easy) and neither Leuko Tape nor Duct tape fixed it, both slowed the leak but it still leaked.
The next day I tried again with duct tape (it seemed to slow the leak the most) but it changed nothing, it would not hold air.
So anyway, learned several things.
(1) Leuko tape does not patch a Exped air mat
(2) Duct tape does not patch an Exped air mat
(3) If you are going to bring an air mattress, bring the .4 oz repair kit
(4) An empty air mattress provides little insulation
(5) Maybe a 255lb guy is too big for UL air mattresses
All in all, good learning experience, bad nights sleep. Gonna get a closed cell foam pad and start trying those out, see if I can find a combination that works, possibly with some kind of blow up torso size pad so I am not 100% reliant on an air mattress. Gonna start with a Ridgerest SoLite and a sit pad size ZLite and see where it takes me.