absolutely NOTHING! actually in a shelter bed bugs would be the least of my concerns LOL everything else is living in the shelters LOL. Once i slept in a shelter alone and when i woke the socks i took off to air out over night were gone when i woke LOL guess mice made a nest with then...
I'm not an expert, however my understanding is that 1) Bedbugs feed nearly exclusively on Humans and 2) Bedbugs do not survive long term in single digit (f) temperatures. These two factors would make it unlikely for them to survive long over the winter. I do suppose that it would be possible to have a seasonal infestation in the warmer months.
Colorless green ideas sleep furiously.