MAHO is not from from the cruise dock but there may be traffic
I would give yourselves minimum 90 minute to return car & get to dock.
If you are early to the ship you can always enjoy the beach near the dock
Alexandr Pushkin, Carnival-Holiday, HAL-(old)Westerdam, Orient lines-Marco Polo, Royal Olympic-Olympic, NCL-Dream, Dawn-Princess, ACCL-Grande Caribe, Oceania-Insignia (3), Regatta(4) Marina (1) St Lawrence Cruise Lines-Canadian Empress
Scenic River cruise June 11,2012