Its a lot of fun! Just consider it camping and geocaching combined with a little puzzle solving and Radio communication. You don't have to be licensed to participate, we can use FRS radios (walki-talki type) to talk between vehicles.
I have no doubt that Ivan's special eye sight helps him. It's interesting how things that blend in to me stand out to him, and things that stand out to me blend in for him...
Maybe we can do a practice run when we figure out a camping trip to go on :D