Without research, I can't think of any RV size/height or propane restrictions in New England, especially Connecticut, on the major highways. How tall is your camper? On the major highways you will be fine, but getting off onto local roads pay attention to bridge height signs!!
Traffic on I95 in Connecticut... lol, I just posted about this in another thread, I am going to copy it here:
Speaking of traffic and Connecticut... you will hit traffic at the border in Greenwich, and it will not let up until you hit the opposite border with Rhode Island. Wish I could give you better news. Avoiding traffic by trying to travel at odd hours is a **** shoot. Rest stops coming from New York: First one is around exit 12 (don't get concerned - the southbound rest stop on opposite side is around exit 8... just keep going). The exit 12 rest stop can be Crowded! All the people with full bladders from getting through New York stop there, lol. You might want to push on to the next rest stop if you can. There are 4 more rest stops up to Madison, really spaced only a few miles apart, then pretty much nothing until Rhode Island. But... those "few" miles of spacing can be a long time in traffic if you need a rest stop.
You may already know this, but be careful of "parkways" - campers/trailers are usually banned from them. So in Connecticut avoid the Merrit Parkway.
