Mendenhall shuttle buses have ticket booths at the dock for $14 round trip. There is no glacier access, from the visitor center side and the closest you can get is an unofficial trail, walking along the lake edge to the waterfall. Have solid and waterproof foot wear. There are several trails to consider, but most have extremely limited views of the glacier. IF you want glacier access, you can take a guided hike from the West side, with Above and Beyond.