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!"
when the date approaches, post on Craigslist rideshare and offer some dollars for the lift. Shouldnt be too hard. Or bribe one of the camp van drivers who make regular trips to the Airport.