Government knows best don't you know! Cause we all know that RV owners can't even wait for an opportunity to dump crap in their own yard.
Too bad you are so invested already...
At this point you need to tell the county that you have abandoned the idea for using this for your trailer, and now you want to use the power for a really, really, elaborate Christmas light display and as an "on the fly" recharge station for your future "green" electric lawn maintenance equipment. (Or maybe for a fountain or a coy pond...)
After you get the permit approved, install the RV plug, and give the politicians a defiant finger when they aren't looking.
One of the first rules when doing any property improvement is to do homework so that a person can lawfully pursue options that do not require pulling a permit.
Once the beareaucrats get involved simple things become difficult.
1/2 Ton 4WD Truck, 72 Sovereign