The Wyndam is a nice hotel but smelled bad around some areas last time we went. As far as charter boat, contact SeaRobinCozumel.com, they are really good. They’ll pick you up at a dock near your hotel. Plus your non-diver can pay a little to snorkel or hang out on the boat while you dive. They will not rush you, the boat has a cover for shade, and they offer fruit between dives...a nice treat. Tell them Greg from DiveBuddy sent you.