Hopefully someone can help you guys out. Our club had one last weekend.
I could be wrong, but I think I remember seeing one coming up near that date in the Frederick, Maryland area. Maybe someone has more/better info.
Dixon's Gunmakers Fair starts on the 23 of July. It is not a rendezvous but if there is any interest in muzzleloading (especially longrifles) It is worth checking out. I don't know how far you want to drive, this is in the eastern part of the state. You can do a search for it online to get more info. I do know people come from all over to attend this event every year. I am going to be there Sat. this year after missing the last two years.
GO TO DIXONS---just in case no one mentioned this idea yet!!! He will thank you a million times over...You can see the best of todays builds plus many from the ancient past on disply---heck sometimes people bring them from both past and present and shove them in your hands to take home!!!!!!