Campy 11 & 12 spacing is virtually identical to Shimano/Sram, so those could be mixed as far as cassette goes.
If it's wheels in, wheels out, then wheels should have the racer's # on them so they get their own wheels. In that case, I would stash them numerically.
( Not sure how wheel vans work these days.)
Last edited by Homebrew01; 09-06-21 at 01:37 PM.