I know this question is WAY early, but do the fall and spring Fremont swap meets usually have a good array of mini sprint and midget equipment? Specifically I'm going to be looking for 13" wheels.

haven't been in the last couple yrs to Fremont SM but I know Jackson Speedway up in Jackson MI runs mini sprint class. See if they have a SM

Don't expect to see any midget parts at Fremont. If Benic is there, maybe... and once in a while there will be something here and there, but generally look for a million sprint cars and parts plus everybody's junk from 30 years ago..........