Sea Grape has their own on-site diveop. Otherwise there's Coconut Tree Divers or Native Sons just a short walk away in the West End. With 10-15 CTD might give you their boat for the week - our group (7) and five ladies from TX shared their boat all week. We stayed at Sea Lodge (next door to Sea Grape) and it was a 5min. walk to Coconut Tree and the West End. I have no personal experience with Native Sons but they get good reviews here. CTD has the bigger boat - a group your size would fill
Wish You Were Here nicely.
You could hire a van to pick you up but it seems silly. I walked my gear down to CTD the first day and left it there all week, they'll help you transport it off the boat, help clean it and then store it inside the store once it's dry all week. It's a safe, low stress option.
Bay Island Diver (Will) is their course director.
I recommend Coconut Tree, good bunch of serious divers that know how to have fun also. Without asking in a week of diving they covered the best sites in the area. Also if asked they set up trips with competitors so you can dive the south side - we dove Mary's Place and the Prince Albert Wreck with Barefoot Divers - and the Waihuka shark dive. Tree at CTD made all the arrangments for us including van transport. You can also do the Dolphin Dive at Anthony's Key Resort - it's about 10mins. drive east.
It's pretty much dead quiet on the point at night. They were building a few condos nearby during the day but I expect that's done by now. Except for the waves breaking on the ironshore - I found that relaxing at night. Right behind the resorts is a good patch of jungle so mosquitos and sand flies are prevalent. No personal experience with either resort but as a drive-by Cocolobo looked nicer.
Food is not a problem either you'll find some good restaurants in the West End. Argentinean Grille was one, Oolonthoo (Thai - pricey), Rotisserie Chicken - not pricey but great food, and about 20 other places within walking distance. Woody's Market or the small market at Coconut Tree for snacks/alcohol etc. Marco (CTD Instructor) did a nice job listing dining options here:
http://www.scubaboard.com/forums/bay-islands/277785-taste-west-end-roatan.html
One last thing, if you have extra luggage space please consider bringing medical supplies for Ms. Peggy's Clinic. There's an ongoing list of clinic/OTC med needs at the bottom of the page here:
http://www.clinicaesperanza.com/ If you go to AKR, the clinic is nearby.