Park & Ride

Click on the link...but from what I've read, should be fine.

Yes. Mist park and rides have a sign up with the rules for parking. Some are a 72 hr limit etc. It's pretty visible. All of them allow overnight parking, some limit "camping" or sleeping in your vehicle, but I've done it several times in my camper with no issues. Hope this helps!

Possibly. I believe there is sufficient room there to accomodate your trailer. If not there is a rest stop about 5 miles or so North of Wells on 95. The Kennebunk Rest Stop that has more than enough room for a trailer that size, as it is a truck stop as well. Just in case you show up at the Wells Transportation Station/Rest Stop and find that it doesnt have enough space available. It can get a little crowded in Wells at times. At least you can have the Kennebunk Travel Center/Rest stop as a back up thats not far from Wells at all. Its maybe 10-15 minutes North at most. Good luck!!