Getting around Juneau after flying in (not on a cruise ship):  

Much to everyone's surprise,  you can get around Juneau without the use of a rental car. One can ride a free hotel shuttle van from the airport to  their hotel, the city bus at $2.00 per (adult) person each way to destinations (such as the Salmon Hatchery) and back to  their hotel, the $8 per person each way MGT (Mendenhall Glacier Tour) bus, a private van for a whalewatching trip, a private tour van that takes  you out to the St. Therese Shrine Chapel (among other places), your own two feet, a tram to the top of Mt Roberts, and then a free shuttle van back to the airport.