I'm not sure if you can do it from TX but an EZ Pass makes life much easier. I'm also not sure of that exact route but in NH, some toll spots you don't slow down with an EZ Pass but pull off to a traditional booth for cash. You're not going through NH but EZ Pass is still handy to not deal with cash. As long as you aren't towing commercial, the camera recognizes a trailer and charges your account accordingly. Value will depend on if you see yourself in the NE again.
Also starting to run into license place enforcement if you don't have a pass. (I got hit in Dallas on a rental car. Avis was nice enough to pass on a $25/day "convenience" charge).