Thanks everyone for your kind comments and for not one single person saying "well, that's a pretty stupid thought". We're both new to this and all that. And yeah, I might be over thinking this whole process, but that's why I'm reading this forum and asking questions. It's to learn what I can and to apply it for when we order a trailer. If I didn't ask (and get good feedback from others), I would always wonder "well, what if we did/didn't do this or that).
So, okay, will keep the furnace in. :-)
And yep, Lucy will LOVE any heat that's cranked out. No doubt about that.