I shipped an 8th within my state one time. I'm currently on death row.
but seriously, if you must ship do it as fast as possible. Get there right before closing time and send it for am delivery. Kind of hard to have a drug dog sniff the package if it's on a plane or truck. Not impossible, but less likely.
I also disagree that your buddy will be in trouble for having drugs addressed to him. Will certainly make them suspicious, and they may place him under surveillance, but no way that actual package can get him in trouble. I mean just think about it; If you ship something illegal to someone how can they get in trouble for it? Certainly suspicious, but they can't do jack shit. Otherwise people would just ship contraband to enemies and get them busted before they ever even get the package.
Not smart to have called from your cell phone. I would have done phony address, name, and phone. Then I would only call from a payphone so there is no way to trace it back to you.