I like the stylized W and the font style of the words seems fine. The leaf treatment also reminded me of a heart, which felt a bit too feminine for the cause. Perhaps a simple acorn rather than leaf?
On the right track in general. What if the W is bolder and the acorn is a bit more obvious. Also like the idea of the word Walden being bigger and Backyards a bit smaller (much like your treatment in #22). The reason I like the W stylized is because sometimes it may have to stand alone or be easily recognizable on its own from a distance. Cheers, Miller
Entry #31 is on the right track. Wondering what it would look like on white (rather than a gray background), with some use of muted color such as using brown for the acorn and the word Walden? Also wondering whether it would make sense to make the framing of the W more like a sheild or crest?