I've been using the regular Unisolar flexible panels for about 7 years now.
Mine don't stick down, but I just throw them up on top of the trailer when
I'm stopped and plug them directly into the battery. They fit perfectly
under the mattress when I'm on the road. Even without sticky stuff they're
so flat that they stayed on the trailer one night with winds over 70 mph.
I've been very happy with them and have camped for several weeks (in really
good sun in Mexico) with only one battery. I'm pretty frugal with power,
though.
Sherry
'63 Bambi