Jeeves pretty much covered it, you basically need to go down to the region level for each club to find schedules. Then as long as there is a race date, you will be able to run. Check the results pages to see what tracks they were at this past year. You can also sometimes go to the track website to see their schedule. I don't see Palmer on the list for NASANE which is a bummer, that's a bucket list track for me (being from Chicago). NASA Great Lakes will run at Pittsburg again next year.
Spec E46s can run ST5 as well in NASA with a little weight and a better tire. Always an option.