Fred, Soufriere will put you closer to the main nature sites on the island. You can walk to the Botanical Gardens and Hummingbird Beach, which has good snorkeling right from shore. You can also take the Fond St. Jacques bus to Jerusalem Falls, which is really more of a natural hot spring bath than an actual falls or get a taxi to the volcano and mud baths. Some good local restaurants there; Skippers (good wifi), The Big Yard, Whispers, and the Petit View Creole Restaurant. If you go into town at night, use the dock near customs, security is better there than at the one by the Hummingbird. I can give you more info when I see you in Rodney Bay.
Can't help you with your C&I question, as my only experience is waiting in the bar for Em to come back with the paperwork completed.