Launch Ramps
 

Are there any public or private (i.e a Marina) boat launches on Lake Winnisquam or Lake Winnipesaukee to launch a Jet Ski and store the trailer at that site for the day?

You can launch from States Landing in Moultonborough, but not sure about trailer for the day. Call town hall at 476-2347.

Lake Winnisquam has a great ramp located off Water St. in Laconia.

It fills up fast so get there early.

There is often a NH conservation officer there so be sure you are in compliance.

Meredith Bay and Center Harbor both have ramps that have some trailer parking if you get there early enough.

Fays Boat yard, for a few will allow you to launch and then leave your vehicle and trailer.... or at least they used to....

Also there is a Launch at the end of Long Island that is owned by Fish and Game, and you can park along side the road

The town of Center Harbor, also has a ramp, and parking area, for a fee as well....

Harillas at the end of Long Island has trailer (day) parking along the road and a public launch. It does get busy but you can usually find a space if you are willing to walk.

ramps
 

If you tell us where you will be staying, it will be easy to give you the best advice. Lots of ramps.

Launch Ramps
 

Roberts Cove Basin in Alton will allow you to launch and store your trailer for $20 all-in. They also have the cheapest gas on the lake.

You can launch and store your trailer at Back Bay in Wolfeboro for free.

Cash only?
 

You are correct about being the cheapest gas on the east end of the lake. I don't think they take credit cards, only cash and perhaps check.

Dave

As of this year they do accept credit cards.