The best way to walk from the Marina is as follows.
Walk toward Trails End/Hoop De Doo from the Marina. Across from Trails End is golf cart parking. Walk through the golf cart parking and you will come to a wide golf cart path. Follow that path till you get to the crosswalk. Cross the road at the crosswalk, then the sidewalk splits. You can take either sidewalk. The sidewalk to the left will take you past Loop 1200 - 1300 -1400 - 1500 and you will come to a golf cart path on your right. Follow that path and it will lead you in the direction of the Campfire/Movie.
If you take the sidewalk to the right, you will pass by Loop 400 - 500 - 600, so on. You will see Meadows Trading Post and the pool to the left. The campfire is near Meadows Trading Post.
This walk on either sidewalk is just under 1/2 mile.
If you would like to take a bus, walk past Trails End/Hoop De Doo and past the petting zoo and you will see the bus stops.
Take either the Orange or Yellow bus and get off at Loop 800/900 for the Orange Bus and Loop 1500 for the Yellow bus. DO NOT take the Purple Bus, it doesn't go anywhere near Meadows.