We did this this summer... highly reccomend! Here's my report on Trip Advisor (Hope this works!).
We found that the AC was a non issue- our captain turned it off sometime between 10 or 11 everynight. I was actually really worried about it- but it was no problem at all.

https://www.tripadvisor.com/ShowUse...land_Tortola_British_Virgin_Islands.html