We bought our unit used and have had very good luck with it.
30 below in an RV? (any RV!)...you better bring your mittens.
I saw a news article the other day about the insect invasion of alaska this year. Remember something about "RV'ers staying inside, trying to avoid the swarms"..
You might want to check that out before heading up there.
I can't find the exact article but here's something similar:
http://www.knoxstudio.com/shns/story...6-14-05&cat=AN