Some of these may not be for truck parts only, but have been sources in the past for myself for great deals on parts;

Spring Carlisle is coming April 19 - 22, I do not set up for Spring Carlisle but Assist a friend, Ken Lyle, 55-57 Ford Parts.
Maple Grove Speedway Spring FleaMarket has been changed to April 7th, lots of parts, towing accessories, performance parts.
Fords at Carlisle is as always the first weekend in June, (look for me at spaces H68, I69 & I70)
Carlisle Truck show is the first weekend of August. I'll post my location when it is known. Be sure to stop in out of the sun!!

Pete