Sorry I'm so late in responding. To make a long story short I ended up having both insomnia and panic attacks. In the end it was only 3 hours of sleep, so I decided to skip it. Instead I did a shorter ride close to home.

There's rumors they are going to repeat it next weekend, so I may try it again. I feel lame, but I just didn't think I could make it on so little sleep and anxiety.

My partner did say the last 15 miles were rough, but it was a gorgeous ride with lots of wildflowers.