I love Fat Wagon! We used to go to car shows in Des Moines when living in Illinois. Did you ever go to "Porkie's Drive Inn" down town? They had some large cruise shows. I think it may be gone now. I still have a Porkies water decal on my '55 Chevy windshield. It's in the passenger lower corner.
We have only attended the last 2 shows in Des Moines. This is our first year taking a car. My wife has family up there so we usually just go up and walk around. Decided to take a wagon this year. Love your 55. I wouldn't mind finding a 55 Pontiac wagon
Lots of small old car sales places and museums not far away. We used to camp right where I-80 makes the bend south on the west side.