Ditto what everyone else has said, but I'd like to add the following:
"Connecticut" (I used Hartford) to Indianapolis is 840 miles. That's *not* 15-17 hours. It's more like 18 hours. Starting at night? Then it will be longer, because (as said above) your body clocks are all messed up. Believe me, my hubby and I tried this when we were your age. It didn't work then, we were miserable!!!!
Indianapolis to Rapid City is even worse: 1085 miles. Definitely NOT 15-17 hours. More like 22! The driving time listed on the electronic mapping program says 16-3/4 hours, *but* it not only does not factor in food and pit stops, it also does not factor in an accident (it can't predict that a month away), major construction that moves into an area, nor does it figure out that your car needs fuel and that does take time.
Now, Rapid City to West Yellowstone, if NOT taking the Beartooth Highway, comes in at a more reasonable 550 miles. Some of it will be on a US highway, rather than an interstate. So pull this one in at 12 hours. You're missing some of the most beautiful country by not taking Beartooth (US-212 from Laurel MT down into Yellowstone via the NE entrance), but it is a slow drive. That's because there are scenic viewpoints to stop at, hairpin curves, and occasionally you'll get stuck behind a slow-moving RV.
West Yellowstone to Portland is another 810 miles -- 2 days to do it safely, or at least 1-1/3 days (600 + 210).
Donna - See more at: http://www.roadtripamerica.com/forum....dZhqlKy3.dpuf