We have done the shindig in May in the past. Better chance of nicer weather and such. And yes, it is open to all that wish to come. As we get a bit closer we start to coordinate on here regarding what food, snack, drinks, accessories folks offer to bring. Last year we did a hatching egg swap that was great fun.
My neighbor, who has come down to join the fun before, does the vinyl work including heat pressed shirts. If y'all were interested, I could ask her about a price to do shirts and they could be picked up then. Just throwing that out there, no pressure.