Since DL's Fantasyland doesn't have any FP rides, yes, the lines for some do get quite long midday, especially Peter Pan and Dumbo. The Matterhorn does too, but it's going to be getting a refurb starting in September.
Yeah I would use EE even in the Fall. Those lines seem long no matter what time of the year in Fantasyland! And actually we went in October a few years ago and found a pretty packed park! So you just never know! I'd use it!