Ring lock , mounts to your seat stays , facing forward Ideally.. with that and a cable or 2

you have the lock there , it will keep the rear wheel from rolling, as you close the Hasp

it can also pass thru the loop of a cable .. In addition to a bit thicker one ..

I also made up a much longer thinner one [hardware store materials ] 10-12 foot

to go around trees and picnic table for the nights in camp.

Another good lock type is Abus Bordo

strongly riveted together pivoting steel links .. it folds , goes in a Pouch on the frame..

ABUS folding locks - Locks / Bike Safety and Security