RV dealers will sometimes raise the MSRP and then sell the trailer for less, but that less price is higher if you weren't at the show. We went in a TT a few years ago. It had the sale price hanging on a cabinet door. I did the usual looking around and when I opened one of the kitchen drawers, low and behold there's an MSRP sheet in there with a lower price than the MSRP listed on the sheet of paper hanging on the door.
RV shows are great to get a good look at lots of trailers at one location. Problem is there's a ton of people looking as well. It's really hard to actually spend time alone in one and get a good feel for the trailer.
A good thing to do is go to the RV show and look at all the trailers you're interested in. Get some brochures so you remember which ones you liked the best.
Then go on the internet and spend a few weeks researching the ones you like.