If there's enough room in your electrical storage compartment where your shore cable lives, buy a 30A shore power extension cord, and plug your hard wired 30A shore power cord into a portable EMS unit, then plug the extension cord into the input side of the portable EMS. I've got a PT30X Progressive Industries model. Then keep the portable EMS inside your lockable electrical storage compartment, and just run the extension cord from the EMS to the post/pedestal. No worries about thieves, because they don't know it's in there (if you're discreet when you hook it all up). You can get a 25' 30A shore power extension cord at Walmart for around $50.
2018 (2017 Sprinter Cab Chassis) Navion24V + 2016 JKU (sold @ ????)
2016 Sunstar 26HE, V10, 3V, 6 Speed (sold @ 4600 miles)
2002 Roadtrek C190P (sold @ 315,000kms)