Death of a Traveling Salesman

Hey folks, I've decided that in an effort to grow my business I need to hit the road in a 36+ foot motorhome. I'm a 35 year old single guy with two dogs.

Part of my plan is to spend at least one year traveling the country visiting Brazilian Jiu Jitsu and Mixed Martial arts academies and tournaments throughout the US.

What is the cheapest way to camp (at a camp ground with electric hook up?). Can any suggest a good membership club? I've been told that there are clubs you can pay a couple of grand for and will allow you to stay all you want any in their network for up to two weeks and you don't pay electricity, etc. Is this a myth? some guidance from folks who've full-timed to travel like this would be great as I'm planning this trip and shopping for a Class a.

Thanks in advance.