For most of our stay there isn't any other particular groups till the 17th. Yes just because there is a theme does not mean all will follow, though April does have fairly good participation. We don't always do them all either especially when there for 2 weeks.
When I see the takeover groups theme nights for early April I will share. Last April it got confusing with the takeover group w one theme, ccc another and the resort a third. But who cares as all were having fun w it.
