Here's an undated look at Fantasyland (probably 1956-57) looking towards the Skyway Chalet. Matterhorn 1959 had a great photo of it a couple of days ago on his Stuff From The Park blog. The chalet is such a neat building, you'd think that it could be used for something (no character "meet and greets" though).
You can just barely see the large sign that looks like an open story book, advertising the Skyway. Not sure why they needed the sign...all you had to do was look up and see the colorful buckets overhead. Who wouldn't want to ride it?
"The Art of Disneyland" (released for Disneyland's 50th) has a neat image of the preliminary artwork for this Skyway sign. Here's a scan...please don't sue me, Walt Disney Company!