Hi Jim, Welcome to the forum. There are lots of activities around the lake during the 4th celebrations, such as fireworks at the Weirs, Alton, Wolfeboro, Funspot and many others. As far as venturing out in a boat to see them, it is a beautiful sight but should be left to people who know the lake well and are able to navigate in the dark, there are many hazards that are not visible during the night or daytime hours. Pick up a Weirs Times newspaper or visit their online version here,
http://www.weirs.com/
And enjoy this beautiful Lake and you and your family will be back year after year.