I use Escapees myself, they have a location in Livingston Texas, Florida, and South Dakota.
It was really simple, I made the appointment in Livingston, stayed at Rainbows End RV park, that is their main headquarters. I think lot rent was $370 a month plus electric. I only stayed 3 weeks. NOTE: there wifi is terrible so don't expect too much from it. They have a pool and 2 different laundry rooms, a place to weight your rig, a dump station if you're just passing through, and some spots for permanent RV's to use.
After I set up the account, I went to town got insurance for the Car and the RV (transferred my account from OK to TX using the same Company), got them inspected, went to the county building where I got my tags, registered to vote, (this is Polk County TX), got all that done the same day, then I made an appointment with DPS to transfers my CDL, that took about a week. Since I have a CDL I had to find an office that handles CDL's. And YES you will need to get an appointment at DPS.
NOTE: When tagging an RV in TX you have to provide proof of GVWR and a picture, TX has a special Non Commercial class of License for RV's.
Escapees also has a few RV parks around the county where you can get a discount if you stay.
I got the cheapest service I could get, I have to email them to have my mail forwarded to where I am at. I think it was $90 a year, plus I have to pay postage for the mail forwarding.
It was a very smooth operation. I hear Escapees has over 60,000 mail accounts, they have a huge building just for mail, they can handle UPS, FedEx, and Amazon deliveries.