Yep, 60 gallon grey tank. I believe I only have one tank because that is what they told me in the brief overview...but I cant say I crawled around to verify...I saw the valve for my fresh tank dump, and there was one other narrow pipe coming over toward where the shower and toilet tank would have been but a line was forming behind me so I didnt investigate too long.
For my first "real" trip I was completely impressed with how friendly and helpful everyone there was. Neighbor on one side of me gave me a few supplies, showed some spots on a map and told me to keep it, guys helping to troubleshoot the dump, etc...
For the life of me I thought the tiny playground with like 3 things would bore the kids in 15 minutes...nope..kept going back to it again and again.
Thanks for all the info, I parked it in storage but will take a look. First time i had full hook ups so I am guessing if it is another valve that it was in fact open the entire time?