Stan if you went 25X25 you call it skeet and soon get bored with it. And 15X37 sounds like it was a heck of a lot of fun. I know about your problem getting enough people to shoot late season fields. I tried to get a group to hunt a large field opening day of our late season. Ended up with no one willing to shoot other than my son.
Going to shoot next to a sod farm tomorrow. It will all be pass shooting doves as they trade back and forth over a hedge row. Find the right spot along the hedge row and it can be a lot of fast action shooting. Long shots with little warning or in your face shots with no warning. Best thing is that finding the birds is a snap over well cut grass fields. Being a more modest shot I am forced to take my 28.