Randy, I think it's great that you're coming here to do the Double Devil! Don't be put off by anything I have to say about it, even though I'm going to tell you how tough it is and there is always the option to get off and push up some of those steeper hills. I've never seen anything steeper apart from short bits of mountain bike trails where you usually get up using momentum. These ones will make you wish you have lower gearing even if you've already lowered it. I used an 11-32 cassette but wished I had an 11-34 on the steepest climb at which point you're travelling incredibly slowly and almost wheelying over the back, and struggling to balance. The scenery is great though, even though you are already used to fantastic scenery I'm sure you will enjoy this. I have no idea whose all going this year but it's got more popular by us lot each year, with me only making it to the first two years when it was just two or three of us. I'm sure you'll have an amazing time.
ps Last night when I nearly caught up with you along with Keiths ghost, at that point I thought I'd play it safe and stay a little behind you as I saved my energy for what I assumed would be an attack on you in the final stages. It made my day that you totally ruined my plan to be right alongside you with a minute to go.