We went to Maine last year but started from RGV in South Texas. We made a two part video of this 3 month trip and several others of our stay in Maine. It may be of some help.
Maine is a beautiful state to visit in the summer. We're going back this summer and also visiting New Hampshire and Vermont.
300-400 miles per day is aggressive and could be tiring. We tried to keep it to about 200-250 each leg of the trip and then explore at each stop.
Here's a link to Part One if you're interested.
TEAM Martin & Joanie, FTers, https://www.youtube.com/RVstreet
2012 WGO Vista 35F, 5 ST, Toyo M122's, Centramatics (all around), TPMS, ScanGuage II, Safe T Plus, SS Rear Trac Bar, CHF (F/R), Koni FSD's, 2017 FORD Fiesta Toad, Escapees,
Making Traveling, FTing and Our Motorhome "GREAT AGAIN