[Descant]

Originally Posted by Dave R

Last Summer I spent a few wonderful days on Lake Champlain and got to enjoy some time on Burton Island State Park.

See: http://www.vtstateparks.com/pdfs/burton.pdf

In addition to day use (for a fee), the park has campsites, cabins and overnight transient boat slips (also all for a fee). It's really nice.

I have also spent time on Lake George and most of the islands on that lake are all part of a park system that allows camping and overnight docking for a fee. It's also really nice. See: http://www.lakegeorge.com/guide/island-camping.cfm

Try Lake Umbagog State Park in Cambridge NH. I think it has all the things you describe.
https://www.nhstateparks.org/visit/s...tate-park.aspx