My friends and I go to college in St. Paul, Mn, but I live in Southern California. They are both native Minnesotans and have either never been out of the state (or not terribly far out of it), so we've been thinking it would be fun to road trip back to my house after second semester (late May/early June). We're considering either going by way of Vegas or the Grand Canyon because they've never been to either.
Any thoughts, ideas, tips, suggestions, etc? Important things are cost-effectiveness, ease and packing as much into a short trip as possible (they want to spend as much time in Cali as they can before heading home).