Hi Randy and welcome our little niche in the internet. Pull up your keyboard and make yourself at home.
May I suggest you read the Sticky's at the top of the board to get started. Shooting muzzleloading cannons is not like shooting a big over sized muzzleloader. There is a completely different set of internal ballistics involved. I suggest you read up on cannon shooting before you start shooting. The recommended reading is
THE MORE COMPLETE CANNONEER By M.C. Switlik with selected excerpts from other artillery manuals Switlik covers all aspectes of cannon shooting both big ones and little ones and is a must have if you are a cannon shooter or want to be a cannon shooter.
The book can be ordered from these two suppliers for around $20 by clicking on these hotlinks:
As far as Cannon Shooting Clubs around the Dallas Area I don't know of any. Why don't you start one.
Later this morning I will be shooting in the South African Miniature Cannon Club Shot. These folks have been shooting for over 30 years. They have rules set out but nobody has seen them for years. Every one know them rules and they just follow them. I am going to try and gather them up and get them posted here on this board.
These rules might serve as a a good base to start your own club. We could even start a Digital cannon shoot right here on the board if there was an interest.