http://www.juneautrolley.com/ without mobility limitations- you can easily walk this, I think better for a first timers is a MGT "tour" (not the shuttle) that runs about $20. This gets you out of downtown and includes a short stop at Mendenhall Glacier. The dock visitor center will have walking tour maps if needed. The trolley is fully narrated which is more extensive for the down town area. This would be best with those who plan on touring some of these buildlings/areas.