Fortunately there are a bunch of track schools, some that travel between multiple tracks. I would look at it from another angle. If you like a particular track, I would check dates and then decide which school is coming to town that week.
This is a good option as well.
Another option is email STT and ask if they have any instructors/control riders that you can hire for a day or 1/2 a day. Often times those guys are local club racers. Tell them what you're looking for so they can match you up with the right person.
I did this when I did a trackday at Miller with Kiegwins last year. They let me hire one of their instructors for a 1/2 day (which was plenty), who also is an AFM racer (current #5 plate holder). It was very good, and I think cost me $200 or so...much cheaper than a full-on school.
I've actually done tha twice, and it has helped a lot both times. 2-3 pieces of advice and/or observations on your riding style can make a huge difference if you work to incorporate the advice.