We were there 3 weeks ago .
Yes you can go outside the compound go in daylight ...if you do a tour just ask the driver to take you to the supermarket.
There is one it is a couple of blocks from the port if you want to walk it.
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