Oak Tree Flake 

Watch your head on the trees. Also, I found it was a difficult location to build an anchor.

Correction to the Supertopo: the bolt anchor indicated for Oak Tree Flake and Grant's Crack on Swan Slab (page 98) is gone. Instead, go ~20' higher to a small tree with webbing/rap rings.

We went up to the tree when we discovered the bolts missing. To TR this for our group we had to belay beneath Grants crack. The slings on the tree were good, but there was a rap ring that had nearly been worn through. Luckily some kind soul left a quick-link we could use.

The flake is real easy but the first move or two from the ground up the crack directly below the right side of the flake are a bit tough for 5.6. It's easier to climb to the left, then traverse right under the flake. No need to build an anchor--simply sling the tree limbs at the top of the flake. Not good for the tree, though.

Try building an anchor from the stacked blocks at the bottom of the Bay Tree Crack.

Nice moves up the flake. If you don't have a #4 it's pretty runout to the branches. Should have read MP first about the anchor. I spent a while looking for the bolts. Climbing up to Grant's Crack anchor added a few more interesting moves.

decent TR for introducing first timers to climbing

Yep, like you said, bolts are gone. I didn't go up to the next tree, just built a quick anchor with no. 1 and no. 2 placements at inside corner left of old bolts. Came here right after Jamcrack, and the bottom moves are easier than that.