Jerry
Osh is easy. Instuctions are on the
www.eaa.com websight or go to AOPA. I assume you will shoot straight across the lake. The airport is closed during the airshows. Get in by 10am and you will need to check for afternoon hours. Think things close down about 3pm when the show hits. Again, before 10am is easy and earlier the better. File IFR, you will bypass all the VFR traffic, especially when you are a twin.
Bet you will get a direct in on 27...
custom? oh yes, this is another state.
bob