Susquehanna State Park, 2205 Hiawatha Blvd., Williamsport; 570-326-2500; www.ridehiawatha.com   Family Night Cruises are special one and half hour trips which depart at 6 pm. Join us for a good old fashioned “Ice Cream Social,”  and make your own sundae!  There will also be entertainment on the upper deck.  The sundae is included in the price of the admission.  Adults $9.00; children $5.00.  Reservations are required for this cruise.