Thanks, all. All great suggestions! Right now, the winch seems to be one of the best ideas, right up there with "leave it in the trailer, lay done some SS flooring, and vent it outside"
I am also looking at this contraption:
Scissor Lift Cart
I can use the hand truck to maneuver the cooker inside the trailer, and onto the cart. The, lower the cart and position the cooker. Since that cart is 150 pounds itself, I'll use the ramp to get it in the trailer. Wow, that sounds convoluted.
Man, if I wasn't afraid of a fire in that trailer, leaving it in there in the most practical. Do you think I am being irrational when fearing a fire? I've only been using this cooker for 3 months, but I've used it every weekend, and never even came close to having a fire. Well, there was that time an ember danced away when I was filling the charcoal pan, and it touched a piece of cardboard....so, yeah, I guess there is risk. Dang it...