I have only been to Paducah, so I really have nothing to compare it to, crowd-wise. When they added the second yearly show in the Fall, there were many less people, but also less vendors. It wasn't as fun. I think they have stopped the Fall shows because of the smaller turnout. So, more people means more crowds, but also more going on. More vendors, restaurants, etc. I think it's fun.
Definitely give Paducah a try, if you have never been. The Harrah's Casino in IL is only a short drive across the river, and they always have rooms, and cheaper than the Paducah hotels, too.