Will be in Vegas mid-November and want to venture out for a day to see either Zion National Park or the South Rim of the Grand Canyon. What are some thoughts on that? We would have a rental car, a full day, and be ready to put in a lot of hours. Obviously neither can be "done" in a day, but I do remember doing a full day trip as a kid from Vegas to the Hoover Dam GC and being very satisfied with the day. Grand Canyon is about an extra 2 hours from vs. Zion, but we'd also get to see Hoover Dam. We would get up and stay up as late as necessary (I understand Grand Canyon sunsets are worth staying for). We love taking beautiful pictures, and would love to possibly do a short hike. So again, what would you do? any tips or advice are appreciated.