Yep, tested it out. All systems are go. Two nights with partial hookups. Had to spend Saturday night reading manuals to figure a few features out, we accidentally had the AC on all night Friday when it was 54 degrees out.
We filled up the grey water tank pretty quickly. That was mainly due to operator error, running the faucet trying to see if the water was hot yet or not. Oops, rookie move. Note to self, don't do that.
But yeah, we really enjoyed our first nights camping in our 2015 Salem 21RBS!