Another recommendation here for "The Forks of the Delaware Historical Arms Society" show in Allentown, PA. If you appreciate older rifles, and you are within a few hours drive, you will not be disappointed with this show. It's one of the few shows left I will actually make an effort to visit. Two very large halls, each room with a few hundred tables. Plenty of curios and relics, and still a decent amount of new rifles and handguns from dealers. So you have both the old and new covered.
Many people also set up their own displays, with various rifle and memorabilia collections from WW2 and earlier. Some are really nice displays of old rifles and equipment. Last show I saw an excellent Luxembourg 30-06 FN 49. It was around $900 or so, and Iv'e always wanted one, but I could not swing it this time. I can not count how many Garands, Mausers, and '03 Springfields I saw. Like any show, some were good prices, others were optimistic.
http://www.allentownshow.net/gunshow_schedule.htm