It is going be kinda messy. The simplest way is to always use the tplink devices as bridges.
You then plug this into the wan port of a router and you have your primary solution for the RV. It is completely protected by the router,
Although non standard I would change the lan IP on your rv router to something other than the default x.x.x.1 I would set it to x.x.x.254. Set the x.x.x part to match your home network. To avoid a possible conflict with some random rv park I would change the x.x.x to something like 192.168.123.x. This will require you to change both your home network and the rv network.
This is all to make switching back and forth easier, ie you don't have to make a lot of changes.
So to hook to...