You are welcome to play Tuesday doubles league, which is open to the public. Sometimes we even barbeque with food we pay for out of our own pockets.
But, we are still building the course. The club allows us to use their land; but, expects it to be self sufficient. Donations, sponsors, tournaments, and memberships are the only sources of revenue we have, and there is a lot of improvements and maintenance still required.
Its probably not reasonable to expect someone to furnish private land, clear the trees and brush, create fairways, plant pins, pick up trash, build benches, bridges, and bag holders, raise funds for tee pads, run league and let everyone come and play for free!
Especially, while we are still working on the course, we need to keep the traffic down. So, the course is limited to course sponsors and disc members at this point. Eventually, we may have other options; but, that is how it is for now.
Your are correct that it is a tiny course; but, it is still challenging and we hope to keep improving it. One of the benefits of a private course, is lighter traffic; so, we can practice and play without waiting day or night. We are lucky in K.C. to have so many great course options if a private course is not the route you want to take.