Hey Billy -
I'm not a bro (as you know, duh) but as far as contacting alumni I would see how much help the school's alumni office will give you with finding addresses, paying for postage and such. I just coordinated our chapter reunion and the addresses the school had were WAY more up to date than what we get from our nationals. I think people know they have to update with the school, but seem to think if they tell one brother an address it magically gets to nationals. It saves a lot of time and returned mail to just go through the school.
Good luck dude
I know y'all can do it!!!