I could use some help planning my itinerary within the park. My husband and I (both in our 40s) will be staying in Yellowstone for 4 nights this August at Canyon Campground. (This is part of a larger two week trip, which includes time at the Grand Canyon, Arches National Park, and Zion National Park). We will be arriving on a Friday (mid to late afternoon) via the south entrance, and leaving Tuesday ~noon via the west entrance. My husband has been before, but this will be my first time. We obviously want to see the highlights like old faithful and the hot springs, but would also like to learn about the history of the area and explore some of the self-guided trails, etc. I'm sure my husband would also love to do some fishing! Could use some help planning our route within the park so that we minimize back tracking. Guess I'm just looking for suggestions in how to divide up our time among the different areas of the park. Thanks in advance for any help you can provide!