I live in Dominica on my catamaran doing day charters out of Prince Rupert Bay so i am a good source for just about anything here. You can message me email me.
I can take you sailing and snorkeling, etc.
For cool local flavor lodging, try Barb Wire Bar and Bungalows, 767 295 2502 www.barbwirebar.com, in Picard which is next to Portsmouth and above the Ross Med School. they arre in the tree tops, with Sisserou parrots and amazing plant life, etc.
Great food and view from their restaurant The Peanut Farm Bar & Grill, see pics on facebook of that.
Aaround Roouseau is more busy and congested, unless you go towards Trafalgar. there are no beaches in that area.
instead, try Mero Beach, and the food at the Romance Cafe is excellent and not expensive. The beaches at Prince Rupert are pretty good, Sisters has nice food on the beach. The Blue Bay is good, and there is the Purple Turtle further north that is ok.
The guides here are great! Try Super Spesh, who owns the Barb Wire or Alexis.
lots of local flavor in the north, and dont miss Red Rock clay dunes by the seaside in Calibishie, also a town worth visiting with nice beaches.
Like i said, email or call me and ill fill you in on anything you need to know. Visit www.syndicatefalls.com for another easy hike to a waterfall info, etc.
It is truly the nature island here!