My 3D is seasoning now at 250 deg so I went out and checked. The bottom is warmer (hotter?) than the sides/top which is to be expected. The bottom is not insulated. However, because of the smokers weight, I would shy away from plastic or anything not super sturdy. My time spent inside my Cookshack has been minimal (foiling, cleaning, placing or removing meat) that I never found the need for a cart or stand. I expect my time bending over or stooping will likewise be minimal with my SI 3D. At 65, I consider it exercise.