It's actually happening this week. I'll be there on Sunday. Sadly majority of the show is taken up by larger trailers and Class Cs. However that's mainly because Class B vans aren't as popular here in the US.
Due to a number of very recent complications, we aren't able to make it to Hershey this week. There's an open site at the Hersheypark Campground for tonite and tomorrow though Senior citizen half price entry ($5) is for Wednesday opening day!
The Hershey RV show is the biggest in the country and is used by manufacturers to preview the new 2018 models. There will be a show about this RV show on HGTV in January!
Not a huge number of Class B's at the last three Hersheys we attended. But lots of ideas if you're close enough to attend!