The 10-15 feet estimate for distance from rig may not always work, so have extra wire to add on in case needed. (Some quick connect arrangement as invented for the situation)
Ground level aimed panel is subject to shading from the RV itself so you need lots of wire depending on how long the rig is and where the wires go to. Slide outs and awnings make shade too.
In the warm half of the year, the sun goes around more than 180 degrees. So if you place the panel out to the sunny side, it has to be far enough out to "see" around the back and front ends somewhat.
If that means the panel has to go in your neighbour's spot, you will have to instead, move the panel during the day from one side of the rig or from one end of the rig to the other to keep it in your own "yard" and clear of the rig's shadow as that changes location.
You can avoid a lot of that by placing your portable on the roof if you can get at it to aim it. That gets you into the world of "contraptions" though :)
