If you're not an ABPA member, join. Newsletters list shoots from a pretty large area.
July long weekend the Pincher Creek Ramrodders are having a 3 day meet, they have a FB page. Nice fun shoot which includes skeet, knife and hawk throw and a couple suppository gun events (apologies for mentioning that but it's nice to be prepared for all events). Biggest restrictions are only iron sights and BP or Pyrodex.