It's hard to say what is gong to show up at any swap meet. For the last ten year or so Jefferson has been mainly Chevy stuff. Every once in a while I'd find a part or two for my trucks. I mainly because it's a swap meet and I like the exercise.
Iola seem to me to have more odd stuff for a larger variety of vehicles. I would say you'd have a better chance of finding parts at Iola. I was also told the meet in August in Elkhorn, put on by the same people that do Jefferson, is suppose to be pretty good. I went there once 25 years ago. I'm going to try to make it down there this summer.
The last time I made it to Elkhorn it was a HOT one. I think most of the swap is on pavement there, so it gets pretty hot, and it is tough on the feet. I know I walked all morning at Jefferson, and I woke up Sunday feeling like I was run over by a mack truck. I don't get it. I can run 3 miles and not feel that bad?
Iola is a lot worse because of the rolling hills. You feel that the next two to three days. It does have more older car parts. Jefferson is more of the late model stuff. There are a couple ford guys there. I did see a couple flathead guys at Jefferson.
It just might be me but it seems Fall Jefferson has more to offer. Maybe because some of the people have finished their projects and want to get rid of the left overs. It also could be that Spring Jefferson has such an awful reputation as a mud pit. Fall Jefferson is usually a nice Autumn weekend.
I can kind of remember Elkhorn being hot, but like I typed, I think I was there only once many years ago. My neighbor likes selling there better than Jefferson because he says there are more Flatlanders that come up and they have deeper pockets than us tight wad Wisconsinites.
I've been going to Iola for 21 years, it is a lot of fun. I usually cover it all in one day, but I've sold stuff with my family in the past and I recall finding things that I some how walked by 3 or 4 times. It's just so hard to find small stuff, so if I find any F1 stuff I usually just ask them if they have more, it's much faster that way. As for weather, it's always hot, and bad years, you may see thunder storms. Check the weather first. Can't wait till July 12th