Fun idea! Here's my $0.02. Get a 1x1. N4S - Need For Speed. Use the same call for the entire season, issue a different QSL for each location. Printed if you have the cabbage, electronic/printable if you want to be thrifty, or maybe offer an SASE option. Or maybe like AA7EJ says, one card with check boxes, issue at the end of the season. Yeah, that could be a lot of work. You already know the capabilities of your hauler's HF setup. Publish bands/modes/times here or somewhere. Get a good contest logger if you don't have one. Write a little schpeal about each location, make it a little more than a 59/73/QRZ contact. Possibilities are endless.