I own a 14x16 Davis tent. They are great tents but the Davis family is even better. Salt of the earth people. They donate tents to Conservation groups all the time. I would say the size of tent you're talking about is small but it sounds like you have done it before. I think most of us think of wall tents as big comfy camps because we make them that way. Sounds like your camp is more of a backpacking camp which works great too. Keep in mind your cart idea is good for a groomed trail, I wouldn't go off trail with it. Me and a buddy drug his Davis Tipi about 1 mile in the winter on a sled and even as smooth as it was it ---- near killed us. Haha.
As someone else mentioned for your style of camping I'd go with a Kifaru Tipi. Yes they are expensive but it increases your effectiveness and range. Either way you go Best of luck to you.