That looks like you're fairly far off route- the correct route in the tunnel is in the 5.3 range and there are no cracks whatsoever nearby. I could be wrong, though, as this photo doesnt give me much to work with on where exactly in the tunnel it was taken.
If you walk to the back of the tunnel, you can climb straight up easy ledges to the piece pictured here in the back wall (a bomber #1 C3 in a pocket), thus eliminating the need for the first three pieces placed here. The #1 was the only piece i felt i needed to get through the tunnel to the crack.
Ya. In this picture the pro is way farther to the right than I was. If you follow that line you have to slab climb sketchy slick rock. If you go further back in the cave till you hit a vertical rail which was caked with chalk, after about 10 feet it's possible to get your back on the wall and chimney for almost the entire thing. The cam in the pod about half way up on the back wall is the only piece I had and it was in a super solid pod about 4 inches wide, 1.25 inches tall, and 2 inches deep (black #5 metolius PC fit). The pod flares a little in the back but that cam wasn't coming out. Sling it long though as you are traversing straight left from it. It's not too important since it's your only piece.