Depending on the age of your boys, there may be a slight price break on entrance fees. Even so, as others have pointed out, the show is expensive and hard to find deals at. I haven't gone to an Expo show in over a year.... I believe there's one this weekend? If I find myself bored and looking for over priced beer and hot dogs, I might go.
Yeah, twice a year for me and Wifey, maybe. We went to the last show. We went just for the heck of it, winter doldrums, and the smell of firearms made for a decent time filler. There's always a bit of a let-down as you leave with out something needed in hand though.