Bring lots of food, a camera, tons of water, and spare bike tubes/tools. Other than that, for the upward grind, brind your aerobic fitness, and for the second half (along the Rim) bring your guts, because if you're not used to that kind of exposure, you'll need it. After the end of the ride, you'll feel as if you've accomplished something for the day, though. If you're not used to this type of riding, I can see it as being an epic ride; if you're from this region, it could be standard(?) Kudos to YOU for trying it, though. I belive it's worth it.