[Callers] dance suggestions for unique setting?

Hi all, I'm calling a dance this Friday on a dock (over a reservoir). I anticipate (fear?) the following problems: mostly new dancers (we're frequently 3/4 new or new-ish); dancers having difficulty hearing me (although I will have a mic); and a relatively rough dance surface (they hold Latin Dance Club events here frequently, so it isn't entirely undanceable). As a result, I've been looking for simple dances that allow dancers to help each other -- lots of contact, and balances/clapping/other "here's where we are in the dance"-type noises have been a focus of my planning. But I'm having a little trouble with putting together a set list with sufficient (to my mind) variety, so I'm turning to the list for suggestions. One additional note: our organizer told me that petronellas are on the challenging side for our group even though they love them; I think this particular dance surface would make them not-fun to dance, too. So I'd really love dances that include balancing a ring but don't include a petronella. Thanks! Louise.