To encourage folk to use public transport, the Gov't provides bike lockers at most major stations. You put your name on a waiting list and as soon as a locker becomes available, it's yours for a returnable bond (key fee) of $50. You cycle to the station and leave your bike safe in the locker.
Take it a step further..............enclose and lock part of the parking areas at public ramps and issue sufficient keys for the appropriate spaces at a bond fee of say 200 bucks. If you want an overnighter, then your trailer is locked up and the only folk that have access are the keyholders. Surveillance equipment inside the enclosure is safe from the general public and if anything is amiss within that area, then it has to be down to a keyholder.
If need be (to raise the revenue) then have it an annual non-returnable key fee to cover the cost of fencing and surveillance.
Would you pay? I would if the fee was reasonable. I'd love to do overnighters but vehicles just aren't safe anymore and my overnighters are limited to the Pin where I can use Rudys or Horizon.
kev