The Sommerset is a lovely location. Very nice venue. I would email the coordinator again if you haven't heard back, just to make sure she is on top of things. I'll ask hubby about Villa Renaissance and Tuscany as he does a lot of commercial work as well as weddings for the hotels on island and he can give a different perspective. We recently had a Chinese tea ceremony a few months back at the Palms I believe, Ileana (who shot it) said it was a lot of fun.
The Beach BBQ would work well with the Sommerset next door to Bay Bistro...a nice easy walk. Sommerset and the Palms and those resorts are nice for guests as well as they are within walking distance to the Salt Mills shops and restaurants and the Regent Village.
The Palms spa is fabulous. I had a facial there a few weeks back for my birthday....very pampered. And a gorgeous setting as well. We have great spas on the island and it is one of the best! It definitely is a top choice in the Grace Bay area.
The golf course isn't that far away, the course is tough but fair. Depending on the time of the year, some of the lakes there have flamingos which is cool. Parasailing is easily arranged at the resort, so no worries there. Your main decision for the boat cruise is choosing between Sail Provo and Atabeyra. Both are nice boats (and I know both owners who are equally nice people) so you can check schedules and see what works.
Here's a link to the blog post of the wedding Ileana did and they had a boat cruise on Atabeyra to see a bit of the boat. This wedding was at the Palms. http://blog.tropical....er-and-nathan/