Help a new official with his first bag?

[rekent]

Up to this point I have no needed to have a "real" official's bag. That has changed and now things are becoming more professional. From reading posts here, it is apparently quite taboo to arrive at the venue dressed (does that include things like all day AAU tournaments?) so

1) Do you all basically arrive at the venue with a small suitcase? Something like a large duffle or small rolling carry-on type bag?

I remember a thread several weeks ago with expansive lists of what the veterans have in bags, but some seemed possibly unnecessary for a new young guy, so

2) What would you recommend I have? I was thinking 2 pair of shoes, 2 pants, 2 shirts, jacket, all the misc. undershirt, socks etc, handful of whistles, official's manual, rule and case books. Anything else that would be a good idea?

I want to make sure I have everything that is recommended/would be needed, but I don't want to be ridiculous and go in with something huge and unnecessary because of inexperience.