The way the thread sounds it seems like you want to know how easy it will be to LEAVE hood. I really don't know since I have only been there once. In july there should be people coming and going often so I guess you should just be friendly and not look like a rapist.
Yah you may not want to be wearing like 7 tall tees and a bandana. maybe go down to 2 or 3 and just grow a beard if you really need something to cover your face and then just stand in the lobby with a sign saying "Portland International!"