I use ratchet straps and vinyl coated cables with locks. It's not bulletproof but will slow them down. Of course if they carry bolt cutters as I do, well.............Always park within pistol range when possible. I have found if you don't use at least 3/8 chain which is larger than cheap ass cable cutters will open to cut, your pissing up a rope. I don't want that rattling around up there. If they are big enough to hold four foot cable cutters and squeeze them to cut that size chain, you better use a bigger pistole'
I bought extra straps on this trip when I bought these because I also ran the High Island trail with them up there on my cheap ass Rola Rack, without a problem! I attach the hooks to tie downs in the rail not the rack.
I usually use color coordinated black straps but did not see any at the local Home Depot that day.:shifty: