I left Cape Air about a year ago. There were great people there and it was a good place to work - good maintenance, adherence to rules, etc. 30K is about right for the first year, but don't expect the pay to go up a lot in subsequent years. There was some dissatisfaction about the pay, mainly from people who had been there for a few years. In fact, there was a union vote at the end of the summer that narrowly failed. While the starting salary is pretty attractive, the cost of living on the Cape is very expensive "in season". I never went to the Carribean, but several pilots told me they actually banked money when they were down there, but then spent it when they came back to the Cape in the summer.
All in all, it was a great experience with really good people. Just don't fall in love with it, because it is a job for a year or two - not a career! If your spouse is a brain surgeon, it would be a fun career. Have your IFR skills in order because 10 approaches to minimums at ACK in day can wear you out.