You can probably get everything done that you listed at an RV dealership. Just drop in at some and pick one that seems easy to talk to and work with. I take my 5th wheel back to the dealership where I bought it when something goes wrong that I can't fix myself. You can probably do the tank dumping/rinsing yourself at a dump station near you. Google "rv dump stations" and you should find several sites that provide locations. There will also be lots of good information in the various forums here, and they're very entertaining to read. Good luck!