I used to carry wood on the back of my hybrid, but with the new 32 footer, I figure it would have to much bounce to add that weight. We instead invested in a gas fire pit, which works great! I still have a real fire in the Spring and Fall for more heat, which we tow in the back of our Excursion.
I'm starting to like my gas fire better than the real fire since it doesn't make everything smell after your trip. Our clothes still smell like smoke after a wash and our camper doesn't have that new camper smell because of the smoke smell.