good points made by everyone here, but the main concern remains; the hospital does not have the capability to cope with these two events at the same time. nonetheless, safety procedures - both medics and the ravesafe team - have always seemed really fantastic at earthcore parties, so perhaps if just a little more oomph is added to that side of things, there won't be any problems.
furthermore, there should be more focus on harm minimisation (assuming the pigs don't step in to 'save us all' from the 'evils of drugs' and present ravesafe et al from doing a fantastic job at saving people from doing themselves damage), with signs up (the safe g dosage thing - or more specifically a 'this is what g can do' sort of poster would be a good idea) about what to do in case of emergency, and perhaps more importantly, how to prevent those emergencies from actually happening.