Our family of four (3 yo and 1 yo) will be coming in to PDX on a Saturday morning and planning a week-long trip in OR. I've been running into roadblocks due to our schedule regarding car rental. We come in at 10:10 on a Saturday, and we are leaving at 4:45 the next Saturday. It seems no one wants to work on a Saturday at any of the rental places close to Amtrak. The airport is an option, but they are getting $100-200 more for the week if I book through them....then add taxi fare, yadda yadda. Any suggestions?