why don't u start to hang out and become friends with some of the sisters in the houses your interested in and tell them the situation and ask what can be done and how they would feel if you showed up and no voice (this might work because they could get to know you before rush and you have all of fall semester). you could always really hit the honey and lemon, throat drops, the works to make yourself feel better. or go to the doctor before and have them recommend a really good medicine. trust me i know how you feel i have the same problem, except it usually happens in the fall for me
go figure, but my voice around end of spet or mid october for a couple of days will sound horrible or I won't be able to talk at all.