We have bought 3 brand new RVs. Our first new unit was bought while at a show. We had been casually looking for a few months, went to the show and really liked the floor plan of a unit we had not seen before. We ended up buying it at the show price, which turned out to be about 29% off MSRP. The salesman said we were getting wholesale pricing. When we compared the price with the different RV Wholesalers web sites, our dealers price was about $500 more. It wasn't worth the savings to drive 500+ miles to pick it up.
The 29% off MSRP is the most we have saved. With our Motorhome, which was selling in high demand, we got 26% off MSRP. With our Destination Trailer, which the dealer could barely keep on the lot, we got 27% off MSRP (ours was the last on the lot and they had 4 more on order). Not really a huge difference between show savings and off the dealer's lot savings.
Do your home work. If you have a smart phone or tablet, bring it so you can compare pricing with the RV Wholesalers. Dealers may not be as willing to deal at a show, because they have a lot of potential buyers.
-Michael