Agree Peter. If I am at home, I'll simply bring it in without the dewshield cap on, and put it on the mount. I'll then put one of those air conditioning / hospital blankets over it (the open-weave ones). Let it dry. Then cap it.
If I take it out to the Dark Side...errr...site, I'll wrap the scope in an aerobics neoprene floor mat, and leave the cap off - it has about 8" of neoprene hanging over the exposed end anyway. Protects it for the ride home (it rides in a bubble wrap lined box) and lets it breathe.
The dewheater straps just about mitigate it altogether usually anyway
