For occasional use / parade duty, Gulfway insurance and historic plates is the way to go. In fact, if you can find a set of plates from the year your truck was made, that's the best route. One-time registration of like $35 and you're good for life. You should be able to find a set of plates on eBay. Don't know what year your truck is but I have a set of1968 plates that I could part with. If it's a year with front plates, be sure you get them both.
Edit: What did Farm Bureau quote you? That's who I have mine through and I'm paying $700 a year for PLPD and Comp (no collision). For my usage, it was the best deal.