If you have mobility-challenged family members, try this- it worked for my Dsis, who has CP and needs crutches for walking.
We dropped her at the main entrance to the Board Walk Inn, then parked in their satellite lot (If you are using disney busses just go to the BWI). We went in through the BWI and down to their dock, where we took a Friendship Boat over to Epcot's International Gateway, which is located between the Great Britian and French pavillions. This is a much shorter walk to any of the pavillions on the far side of the lake (germany, usa, morocco, etc)- maybe even a shorter wak to Canada, too- than parking in the front lots of Epcot or taking a bus there.