Back Bay and Cambridge are convenient and accessible and it is easy to blend in at the larger hotels. Hotels in the Boston area are scarce and pricey at this time of year because of graduations and conventions, and so the Route 95 belt west of the city, where hotel rooms are a bit less expensive, is also a popular choice.
In terms of boards, I mostly look at TER and Eros. On Eros, like most ad boards, there are scammers and ripoff artists mixed in with the genuine ads.
Good luck. We'll look forward to the arrival of your beautiful ladies.