I frequently get offered hangars by kind folks here on the forums when I travel, and those instances are very much appreciated, and I take advantage of them. But I am also fine tying the airplane down with a good cover on it for an overnight - or in the case of Oshkosh, a week or more! The airplanes won’t melt, and the odds of something bad happening on any particular night are pretty slim.
If you think about it, someone is more likely to want to steal avionics if they are hidden inside a hangar than out in the wide open on a ramp where folks can see them…. Remember that breaking in to most hangars involves removing some sheet metal screws on a back wall where no one can see you!
We’ve got Bruce’s covers for all our RV’s, and they are well used.
Paul