Hmm- second worry is- how much do they ride? Should I be really ramping up my fitness to ride all day- I mean I like to ride but rarely ride for more than two hours.
As bounceswoosh said, mornings are skill sessions, so while it's a lot of hours on your feet/bike and you're working on skills, it's not like you're out pedaling for hours. And if the skills sessions feel like too much effort - you can always sit down and take a break and watch whenever necessary. Though, obviously, it's always nice to have as much fitness as reasonably possible so you can get in all the practice you can or want to, you know? And like most things - you can go at it nonstop or you can try something a few times and rest and drink some water... your pace is up to you. That is the nice thing with morning skill sessions - you don't have to keep up with anyone and you can still learn no matter what.
And the afternoon is small group rides. And it will be broken down into XC and lift served riding groups. So if you aren't feeling up to pedaling (at elevation), you can certainly request to be in a lift served group. You would want to voice that early, as it's harder to change groups at the last minute, but it's generally not impossible if you are feeling more exhausted than expected. Personally, I think that unless you want to work on climbing skills, I always feel like you get more out of lift served riding for coaching anyway, whenever it's an option, because then you get to kind of save your energy to work on the features while descending, instead of burning up a lot of energy pedaling to get there. But that's just my nature too.
I'm up for skipping the climb whenever it's an option! And if you do the XC ride groups, they will try to gauge things so the groups are reasonably matched, though it's never going to be perfect. So there will be some waiting by the fast people and catching up by the slower people, but you will have plenty of stops to discuss technique or session various obstacles or corners, so it's certainly not a race. I know in the past, we've had one or two people complain after the clinic that they "didn't even get their workout in and were going to have to go on a road ride afterwards." Well, yes. It's not fitness camp. It's a skills camp. Fitness may help you focus on the skills more, but the goal is not to test your fitness or give you a workout, you know? I think most people are pretty worn out after each day, but obviously it varies. There will be people there who don't ride much at all, and others who are high level endurance athletes - don't worry about being on either end of the spectrum, because you will still have a great opportunity to learn bike handling skills no matter what.
Definitely don't be scared about the bike park either. There are things to work on at seriously ANY ability level at Winter Park, including lift served riding. Green mile is fabulous fun for a lift served run, and there are a number of blue trails that are great stepping stones as well, and have jumps and things that are easy to roll if you don't want to be in the air.
I won't be coaching this year - I've been taking a break, as I've been really busy with my regular job, but there are a lot of really fantastic coaches and I'm sure you will enjoy it.
And I know they have talked about trying to figure out a way to do the riding in the morning and skills in the afternoon because of the afternoon storms, but I really don't know how to make that work. Hah, if you go out on group rides before working on the skills, it's definitely kind of backwards!
So fingers crossed you have good weather!