At the end of the day, it is your track Mike, you have the right to put in what features you see fit and to put your own stamp on it.
All that racers really ask for is this:
Consistent features
Universally achievable features (yes, the national series has the cream of the crop competing, but it also has the other end of the spectrum who pay the same entry fee and deserve to be able to enjoy the track and not just have 5 minutes of frustration every run)
A good size track, not easy but one that will allow the less experienced to get around, but the experienced to get round faster.
and perhaps most importantly,
a racetrack, this is not rock crawling or aerobatics
Stick to the basics of things like widths and heights, take into account the potential for bad weather i.e. don't use exposed wood too often. You have a bunch of experienced guys at the club and I'm sure they will come up with something.
I wish you well, do the mid west proud