Unless you’re going to outlaw non-2.4 GHz radios, you need control of those frequencies.  You each spend hundreds of dollars on a single model making sure it looks good and performs well.  If you're going to use frequency pins, why cut corners there? You may as well have the most attractive, customizable frequency pins available.

Maybe your club is lucky enough to have a Joe/Pete/Sam, or whatever his name may be.  He's the guy who always does a lot of drudge work for the club, like picking up the trash other people leave, or building the safety benches, or clearing the paths to the common crash sites.  Those without woods or tall grass and weeds may not get that.

If you ask Joe/Pete/Sam/whoever to make a new set of pins for the club, he’ll do it without complaining and may even say he would love to.  As long as Joe the Pinmaker is around and still a member of your club, you can keep asking him to make another pin every time someone loses one or takes it home and doesn’t bring it back. Yeah, he's gonna love that. In reality, he may prefer to be working on one of HIS  projects.

Also, do you plan to compensate him for all his effort? Think about making all those pins yourself. Think about each step of the process. There is a certain amount of time and energy involved.  Get CoolPins and let Joe work on his own stuff.