Hey all! I'm new to this site & I was hoping that someone might be able to give me some advice. My wife & I would like to take I-90 west from Boston & eventually end up in Portland. The deal is that friends of ours are moving out to Portland and are paying for our gas to take their car out there for them (they can't drive, as they have 2 young kids). We've wanted to drive cross-country for a while anyway so it worked out perfect. There are really only a few things that are must-sees for us, as we travel across the US via this route. They are - Niagara Falls, my brother's family in Minneapolis, Mt Rushmore & Yellowstone Park. I figure that we will br driving 8 hours or so a day & my question is this - what is a reasonable length of time for this trip? Is 7 days enough? Should I try to hit up the boss for a couple more days? I'm sure that some of you have experience on I-90 & would have a better idea than I would. I'd like to tell you I know exactly how long we'd like to stop at each landmark but we honestly don't. We've never been to any of these places & really don't know what to expect. I also realize that a lot of this depends on the individual but still, any information would be REALLY appreciated! Thanks!!!