[dad911]

I left my trailer keys at home once, realized halfway to the track. Friend opened them up with a 1/4" drill bit and a cordless drill in about 10 seconds each.

Locks just keep honest people honest. I'm not too worried about trailers at home or track. At hotels I would cable chain the trailer to the tow vehicle by the frames, and take the removable steering wheel for the racecar with me. I also park under the lights, look for security cameras if possible.

Removing wheels probably would be the most effective. But I found most theives don't want the trailer, they want the contents.

A friend put graphics on his enclosed trailer to resemble a 'private security company' with a bold shield on the side. That probably works....