With the 37's and a pintop suspension, I'd go low with plate. I get looked at and occasionally asked what state I'm from going through the agriculture checks on the CA/NV border. On interstate travels I'd have it on. My intent while traveling is a pair of permanent black nylon 1/4-20's mounted from behind the DG held with some locknuts, and then hold the plate on with some black wingnuts easily removeable, & I'll probably run it in the low position. Might even drill some holes mid-plate to bring it up a little higher now that I'm thinking about it.
I thought about something more permanent spring loaded, but it seemed more trouble than it's worth. I also have a couple of seriously bad ass magnets I thought to use, but it hasn't got my attention yet.