It kinda seems like your concentrating on some of the wrong things (patio, pest control).
You need:
Electricity. This is the one thing that can make an RV habitable long term. Also, in order to build anything, you need a temporary electrical post.
Water. You will need a constant source of water whether you haul it or what ever.
Sanitation. You need a way to get rid of your sewage. You may be able to get a "Porta-potty" type service to come by at regular times to empty your tank. Or, you can use a tote if there's someplace near by to dump it.
Doubt you would like a composting toilet..
Don't even try to live in your RV without some way of covering these needs.