If you think Maine is a big state to drive across, You should drive to the West. I-90 through Montana is over 400 miles! Congrats on a new HP, hope to see you in the west half of the country!
I keep toying with a trip up to ME but figure I have to finish the Whites first. Maybe I'll piece together the entire AT before I retire ;-D
Well that IS the way to finish the AT, on Katahdin! But still you should make the long drive and go there. It's a real treat.