I did Henleyville last year when I had crap fitness and feared hills (I still have crap fitness). I was fine and you'll do fine. 4 laps with one small roller into the feed zone and some wind. The finish is on a "hill" that is just a little punchy climb. We got a little bumpy coming into the finish and I ended up in the shoulder, didn't crash but lost any and all position. I'm pretty sure I'll do it again this year.