Anti theft devices

End of 2019 wife and I started talking about taking the 65 Dart and doing a Route 66 road trip (before Covid-19). We're still hopefull that by mid Sept we'll be able to travel. The plan is to go south from MN and jump on at Galena, KS and head west all the way to Santa Monica. Looking at 2 to 3 weeks there and back with lots of stops. My question is we'll be staying at a lot of motels on the way and I don't want to come out in the morning and cars gone! :( Thinking pulling VR wire off maybe something else, would a wheel chock also be a good idea? I have a few months to figure this out yet

Dart.jpg