Giardiasis, a waterborne intestinal disease is common in Alaska. Moose and bears are protective of their young. It is dangerous to approach them especially during the spring and summer. Do not disturb nesting waterfowl or bald eagles. Generally, the months of June, July, August and September are cool and rain can be expected.
Portages are generally short with traverse level or slightly hilly terrain.
The longest portage on the Swan Lake route is about one-half mile long. The longest portage on Swanson River route is nearly one mile long. Camping is allowed throughout the refuge. Registration of canoeists is required at all three entrances. Group size is limited to 15 persons or less within the canoe system lakes.