Our family is planning a 4-5 week trip in the summer of 2012 during which we hope to hit many of the major national parks. My children will be 14, 11, and 10. The tentative route has us going through Colorado Springs to Arches, down to the North Rim, up to Zion, then Hoover Dam, a quick swing through LA area, up to Yosemite, over to Grand Tetons and Yellowstone, than heading back east (PA is home) with a stop in the Badlands/Mt. Rushmore area. I am particularly interested in travel tips, best routes for an RV (28 ft. Class C motorhome), and suggestions for unique places to see along the way. Would also welcome thoughts about the North Rim vs. South Rim and advice about the best way to get from Yosemite up to the Grand Tetons. Appreciate any help that you can provide. Thanks!