I am not overly familiar with water transport at WDW, but yes this could have been takin from the lower deck of the ferry, also there is small water craft transportation for hotel guest of the Magic Kingdom Resorts.
Glad to help, I will keep working on some, it takes time to sift through several hundred other pics to match stuff up, of course somethings are just gone now like the Garden House/Center Street and found a 20+ year old pics to identify it.
#33 I believe I have traced this to be around the corner from the Splash Mountain Exit Queue Restrooms, it can not be see on Google Street. I did find some other ground level pics, and the columns and roof seem to match.
#14 The Car was taking on what was Center Street West in front of The Greenhouse Shop which was lost to Emporium expansion in 1984 and disappeared in 2001 with the fill in.
I believe the rafters are a faux treatment to look like old school stages, if it is for Fall Arrest, it would need to be anchored to structure able to withstand a min. 5000lbs of force.