Wow!!! This cruise brought many wonderful childhood memories back for me, as this was an annual summer tradition that my family undertook. That was to board the Mt. Washington and take a day cruise in New Hampshire's largest body of water, Lake Winnipesaukee. It is a 2.5 hour cruise that was very relaxing on a Monday. Warning: on the weekends, it might not be quite as relaxing, but I can guarantee the children and you will still enjoy the trip!
Lake Winnipesaukee is largely a spring-fed lake with a total of 365 islands. Of course, some of those islands may be as small as a rock, and other islands only have room for a couple of homes, but with one island, Governor's Island, that I know of, has numerous homes. In fact, there are too many to count.
If you are in the area, I highly recommend the trip. With the pictures, I am sure, you can imagine what a spectacular fall foliage trip would be. The Mt. Washington offers limited trips in the fall, but very worthy trips. The ship also offers sunset cruises with various themes. I think I noticed they were having an Elvis cruise soon. I haven't been on a sunset cruise in awhile, but when I did, I can tell you the food was fabulous! The Mt. Washington is also available for private functions to include weddings!!!!!
There are also other boats should you want a shorter cruise!!!!