Scott,
Are you one of the athletes competing or emergency service personell???
I'm assuming one of the ER people. Well, only you will know what you can and can't do. With that being said - I don't want to be "Debbie Downer" here - but keep in mind that people do not come with "handles" and the weight of lifting patients is not evenly distributed...Hard lesson I learned as an ER nurse. The course you have described appears challenging enough - then having to provide patient care out in the "elements" and seeing that you have had to fly some out in the past = a lot of lifting if the athletes run into big problems.
If you feel that you are 110% at this point and doing stuff like this makes you feel "alive" again. Then, I say go for it - but keep body mechanics in mind at all times!!! If you don't feel 110%, perhaps attending and working in a different capacity (less lifting & etc) at the event will satisfy you until next year.....