Just found this bag, complete with light shields for the LCD and risers to help ventilate the laptop. Looks really good to me. There's one other brand that's $20 cheaper, but it isn't as well made.
http://www.kata-bags.com/Item.asp?pid=226&cid=62&perentId=4&ProdLine=4
With an extended battery and self-powered drive (or using the laptop's drive) I think you'd be all set.
http://www.kata-bags.com/Item.asp?pid=226&cid=62&perentId=4&ProdLine=4
With an extended battery and self-powered drive (or using the laptop's drive) I think you'd be all set.