Pete, I saw go for it. Eespecially if the doc. gives his ok. DE's are such a blast and a great way to relax (believe it or not).
Reminds me of a funny story....
A buddy of mine was instructing for a Car Guys venue at VIR a few years back. After his first session with a green student driving a Mustang Cobra, he tells me that his students hands and head were shaking considerably more than the current track/car vibrations. After the session, he was talking to his student about that last session, all the while while the students hands and head were still shaking. The student notices Adam watching his gestures in confusion, THEN decides to inform him of his mild Parkinsons.
He would have much appeciated that info well inadvance.