Regarding the timing, the boats only run 1x per hour during the day, and then at 4pm they run every half hour. The boat stops at docks both in the Marketplace and West Side at DD.
Unfortunately the dock is kinda out of the way. Once they build the units out on the LBV fairway, the dock may be within reasonable walking distance of some units. But given the location of the dock respective to the current units, and the infrequency of its trips, taking a bus or walking is much more reliable.