Im just guessing if you plan to go to the conference most people in the general area will be expecting alot of crossdressers to be in town. Can you possibly do some research and call a doctor in the area. Explain to them the situation and see if they would mind if you came in in full girl mode. They wont know who you are from a phone call. If they gladly accept then you know you will be ok. If they sound not so sure then plan (B) either put it off till u get back or DIY. As far as the bruises you may want to resort to a cute pair of slacks or tights to cover up the damage.
