OP: cralri.org is a great resource, as is northeastshooters.com; both are excellent sources for answers and insights on law/legalities/processes/norms for their respective geographies. Here is my quick summary of your new surroundings:
CT non-resident CCW is shall-issue and done by mail, so go right ahead as soon as you get your RI license. Standard capacity magazines are good to go, but CT does have an AWB in place that you should research with respect to long guns.
MA non-resident CCW is nearly shall-issue, but they issue with restrictions tied (‘at a minimum’) to any home state restrictions. Oh, and it costs $100/year, and you have to make a trip to Chelsea (outside Boston) for interview and re-fingerprinting every year. Other than that, its a breeze :rolleyes: . MA has a full-on AWB as well, including magazine capacity restrictions (with pre-9/14/94 ban exception). The ‘MA-compliant gun list’ only affects a dealer’s ability to transfer a handgun to a non-LEO, but even though Glocks and HKs (for example) are not on the “approved roster” set forth by the state AG, they are still frequently seen in state (and perfectly lawful for possession, carry, use and face-to-face transfer). There are also statutory exceptions for non-resident possession of various firearms without an LTC or FID in the MGLs, but I bet that most LEOs won’t have the foggiest (even if you carry a printout), so if you’re going to bring hand- or long guns to MA, I would recommend getting the non-resident LTC-A. Oh, and MA gun stores can’t sell ammunition to non-residents (even with the NR LTC), so bring your ammunition with you.
NH non-resident CCW is shall issue, by mail, good for multiple years. NFA friendly. Live free or die.
VT has constitutional CCW, statewide preemption and effectively no firearms laws of which to speak…as a result it is the wild, wild west with drive-bys and Sinaloa/Chihuahua/Tamaulipas-level street violence…
ME non-resident CCW is shall issue, by mail, good for multiple years. I don’t recall there being any AWB or unusual long gun restrictions.
NY is, for almost all intents and purposes, a no-go for non-residents with respect to handguns. There is a statutory exception for handgun transportation (not carry) to attend an NRA-sanctioned competition, so switched-on trainers have sanctioned competitions at each day of their NY training classes. Like MA, NY has a full-on AWB and magazine capacity restrictions. FOPA may be Federal law, but it gets interpreted “differently” at the ticket counters at NY airports, so best advice I can give is, avoid at all costs, but if you have to transit through/connect, carry & follow the rules to the letter, and do not take possession of cased handguns at LGA or JFK.
Hope this is helpful; please PM (or ask here) and we will try to point you in the right direction.