Not sure if applies, but I took the $200 portable surge guard I didn't like leaving out at the pedestal, and put it inside the cable box where the door can be locked on it.
This involved chopping up the surge guard, undoing the shore cable bitter end in the J box, splicing the surge guard to the J box inside the cable box, and splicing one end of the surge guard to the bitter end of the shore cable. The other end of the surge guard and the bitter end of the shore cable now plug into each other inside the cable box.
All that is strapped down inside the cable box as a "strain relief" for pulling on it, and now the shore cable still comes out from its cable hatch door as before, but now the surge guard is inside the lockable box.
So you could do the same thing by undoing the bitter end of the shore cable and inserting an adapter with a 30a RV receptacle on the outer end to hard wire on the J box where the shore cable was, with a 30a RV receptacle on the outer end of the adapter.
Add a 30a RV plug to the bitter end of the shore cable so now you can just plug it in to the adapter where it used to be hardwired (surge guard optional)