JMO, but go to a show already armed with information. Right here at RV.Net is a start. A good scratch around manufacturers websites is a necessity to determine possible models. Next comes the local dealers to get some price ideas to compare with show 'specials'.
RV shows are mind numbing, especially if you are looking at mid market or less product. Upper end product is not so plentyful so looking is easier between only a few builders.
The looking part is the fun part. Doesn't cost anything. Have fun. Don't buy a mistake just because the price was so good.