This is very interesting. I have a 2013 Surveyor SC189 and had the same issue. We were getting ready for a camping trip and decided to de-winterize the camper before we go to ensure no pipes busted during the winter. I put the water heater anode in and tightened it down and hooked up the city water. It wasn't until about 10min later that I saw water dripping from the front right outside end of the camper. After looking into it, I saw water in the outside storage compartment. I traced it back up and saw water in the storage underneath the bed...and went further and saw water near the wall side of the camper underneath the sink in the water heater area. Unfortunately, I couldn't pinpoint the leak and my arms couldn't reach to the wall side of the water heater to feel where the leak was coming from. Even though we had a leak, I was going to bypass the water heater and still go camping. ...at some point before we left camping and me playing with the water heater, I lost the anode rode...so I purchased a campco anode in hopes I would need it. At the campsite, I tried it again, I installed the anode and could see a small amount of water leaking from the outside anode plug..so I tightened it some more and saw a little more leaking from the inside..so I tightened even harder (much more than I really wanted to or thought it should be tightened). The water seemed to stop leaking from what I could tell, so in the morning I flipped the water heater switch and I haven't seen any more leaks ... Maybe the heat produced by the water heater had something to do with it...or I didn't tight the Anode enough and water was leaking through the snap ring... What ever the case, I hope it doesn't leak again! What ended up happening to your camper?
2006 Nissan Xterra 4X4
2013 Surveyor SP-189 Cadet