Thanks for the quick replies! I've seen the debates on running the refrigerator underway on propane, but I've never seen a similar debate on furnaces, so as a newbie I was unsure ...I'm not really happy about running with the propane on, but since I was unable to keep my refrigerator cold when on the road for 8-10 hours, I've had to cave on that one. I guess I might as well go all in with the furnace, now that I know it's standard operating procedure. :-)
Bordercollie--the whippets ALREADY have snuggly polarfleece coats, but are demanding supplemental heating! :-)