There used to be a fly in for full size aircraft at a lake called Winnipesaukee in New Hampshire when the lake froze thick enough.
I flew over it one time, a low pass just about on the frozen lake, but didn't put the plane down. I never liked winter activities except to ski.
The plane I had was a Lake LA4 200T which was actually built not far from that lake.
The real fun was this lake in Old Sturbridge Village, MA. Had a great restaurant and the owner welcomed seaplanes.
They had a large dock to taxi up to but was really for boats.
People liked it when planes came in and many said "Great landing," to the pilot.
You could eat outside and inside.
I never put the plane on ice or in salt water.
A balsa scale model of the Lake LA4 200 was produced but I cannot remember by who?
Mr. G's Models produced a R/C Widgeon and the Republic Sea Bee. Fiberglass fuselage and parts plus Foam wings.
I built them both but never flew them in water.
I will build another Widgeon.
Charles