Brad,
Your last post clears up what you're looking to do. Don't leave out Blackhawk Farms on your list of tracks. It's a blast (no super long straights to "rest") and better for the family/friends as you come by many more times a race compared to RA. Shorter track. Nice facility too. Basically the same distance from the Twin Cities as RA. There is a race there on October 7-8. Register on MotorsportReg and you can see the entries and the schedule, etc. That site is where most people register for races.
If you have not sat in a formula car, I'd suggest you reach out to Steve Thomson soon. He's got a couple FC cars with MZR engines and sequential boxes in Minneapolis. They won't be here for long (like days) as he's moving his shop. Doing an arrive and drive with him next year will go a long way in helping you decide what to do. He has run top drivers in his cars, including Jordon Taylor and RC Enerson. Not to mention being a 2 time June Sprints winner himself.
Jim