That's good too hear people see Class A's launching pontoon boats, a pontoon is way more difficult to deal with than my boat.
When launching my boat, my suburban, pick up etc never gets that close to the water. The boat trailer sits low and the boat floats shallow so it comes on and off with the tires and bumper of the launch vehicle a good ways from the water. I can usually keep my feet dry when hooking the boat back up to the winch once I drive it back onto the trailer.
I'm not worried about getting the RV in the saltwater while launching. I'm more concerned about dealing with the transition from completely flat ground to a steep ramp and the boat trailer or RV bottoming out somehow. It may not be an issue and I'm over thinking it.
I probably need to rent a class C with the biggest nastiest overhang I can find and see how it is dealing with the boat.
I don't think backing it will be too bad, the guide posts on the trailer are 102" and I thought about taking somme electrical ties and putting surveyor flags on them that stick out even further so I could see them from the mirrors. Back up camera will be a big help too.