Let us know how it goes, I just signed up for the boot camp class for my mid-May trip. I mostly do exercises with dumbbells and go on the rowing machine so I'm not much of a runner. I also signed up for aqua yoga the following day so I'll see how that goes.
I did both the Boot Camp and the Power Walking and they were both super fun! The classes were a highlight of my trip! (Except for the super early morning start time


)
For the Boot Camp, 1 guy and I were the only participants. The instructor was a guy and he was very energetic, fun, and enthusiastic. We did some jogging and walking, making a loop around the park. At different places we'd stop and do exercises. For example, in the WOC viewing area, we did 8 squats, 8 lunges, then ran up all of the stairs, then ran back down to the start. Then he had the guy increase to 10 of each, but I stayed at 8. For the third set, he had the guy increase to 12, but I still stayed at 8. This was because I was slower than the guy, but he didn't make me feel bad about it at all, and I honestly didn't mind just staying at 8! In the Avengers area, we used a ledge to do push-ups, tricep dips, side planks, and I think mountain climbers (if I remember correctly).
For the Power Walking & Active Stretch, there were about 18 participants. The instructor was a woman and was also super energetic, enthusiastic. Very friendly & encouraging. The walking was 18-20 minutes per mile. There was more "active stretching" and exercising than I expected, but it was fun.
At the end of both sessions we returned to the area in front of the spa. They had bottled water and Kind bars.
If you like exercising and don't mind early morning, I would recommend the classes! It was pretty cool to see California Adventure before it opened. The cast members walking around were all friendly too.
Hope you get to do the class!