Usually, a dedicated doctor will make an appearance at such Confrences. My sister is in another part of the medical field, and she either goes, or is even sent by the hospital for better PR with the patients, as well as staying up on things!
It's a great effort for those doctors who travel half-way across the states to go, however!
If I end up back in the states in the future, my current place of residency will be south of Denver!