I have a trip coming up but I'm not sure how cramped trains are I've never been on one before. Will the MBP be too wide or anything? My friends say it is pretty crowded but I'm not sure how crowded relative to my MBP. We're going coach (last minute trip) so I'm not sure if the Amtrak has outlets. About how long should the MBP last if I just watch DVDs with the wireless stuff off?