when I did Montreal to Boston, there was a heatwave, high 30s most days, and the fellow I was travelling with and I ended up staying in cheap motels, split cost in 2 was ok and a/c was appreciated. So although I did the route, I dont have camping suggestions. But it was a nice ride, and Boston is a neat city to be a tourist in, was my first time there.
I'm pretty certain I have somewhere the gpx route that the guy I went with made, if you are interested in seeing the general route. Let me know.
Jim, how are bugs in the Boston area in early June?
as for Pacific coast, it certainly is a beautiful trip, I guess you'd just want to look into it more to see how you feel about it road wise and hill wise.....there is tons of info on it, a really popular route. Heck when I did it in 94 there were loads of other bike tourers , well not loads, but at nearly every campground there were some.