Was looking at Princess Auto, seems it's cheaper to order these sockets individually than to buy sets, oddly. The sets are all the smaller/standard ones I already have. Measured the nut and it's about 25mm so going to get a 24,25 and 26 to be safe. It's only 1/2 drive" though but pretty much all of them are and I always end up using adapters. Just like to avoid it if I can as it's a potential weak spot.
Bought a pin as well, so instead of putting the bolt back in I can use a quick release pin.
At least after that, it will be easier any time I want to go to the carwash. Technically I should not even leave the hitch on anyway as it's a liability. Insurance does not cover anything past the bumper. Ex: someone walks into it and tries to sue. Won't be covered.