Anachron, That would have been our trailer you walked though last week. As we just got it I can't really comment on how warm it is just yet. I suspect that the insulated construction is going to stand up well to our cool and wet BC weather. I will keep you posted.
We are towing it with a GMC Canyon and with the trailer
brakes you can hardly notice that the trailer is there. So slight bouncing over bumps but no noticeable pushing or swing. We went to the 15" wheels to get some increased clearance and also to get it closer to the height of our truck. We the Canyon I don't plan to by trailer mirrors as the rear view with the side mirrors is fine.
I don't see any reason that you would need to go up to a F150 or similar sized truck.
Hope this helps, feel free to ask any other questions you have.
Mark