Is there a shoot in Florida or South Georgia in May?
Two good places to check would be 3Dshoots.com or the 3D shoots forum on Bowsite.com.
I also forgot to mention that you could check the "Trad Event & Gatherings" forum and the "Traditional Bowhunting Organizations" on this website, or if you can get a hold of a recent copy of TBM, they may have a flyer listed.
Good Luck, Bob