We went to the MNPLS show two years ago.
We weren't looking to buy, just to see what was available, and especially had hoped for seeing a lot of camping gadgets and accessories. We saw VERY few gadgets/accessories. I think there were maybe two booths selling stuff and one of them was Camping World but they didn't really have anything new, innovative or inexpensive.
Like you experienced, almost all the units on display were high end, way beyond our reach even if we were interested. We are pretty basic campers and really don't like the power everything. We don't need a fireplace or a jumbotron TV inside and outside. We expect to have a campfire and read books.
I doubt we will attend another RV show, at least in Minneapolis. I can find other things to do on a cold Minnesota February afternoon.