I'm familiar with many of those Maine town names - Portland, Lewiston, Biddeford, Sanford, Brunswick. I'm wondering now though whether there was already a slot car track in Portland when I visited there around Thansgiving Day of 1965.
I don't know about '65, but in the fall of '67 when I started commercial racing, Portland had two raceways, an American Royal across the street from Portland HS & a Mr. Raceways 220' track at Woodfords Corner. I do not know when either raceway actually opened, but slot racing in Maine wasn't widespread until '67. Maybe one of the old '65 slot car magazines has a raceway listing?