Highly recommend T.O. Fuller State Park, on the west side of town, easy 6 mile/10-15 minute drive to Graceland. Nice wooded sites, $20/night with water and electric plus a 25% senior discount if you're over 62. Graceland was very interesting even though we aren't super big Elvis fans, spent the whole day going though all of the different areas. Other must sees not in any particular order and depending on your interests: Sun Records Studio, Stax Museum of American Soul Music, Gibson Guitar Factory tour (pick a time earlier in the day so they are in production), just walking up and down Beale St. and checking out the live music in all of the bars. We had the best BBQ at the Blues City Cafe on the corner of Beale and 2nd, liked it better than the Rendezvous. The Civil Rights Museum at the Lorraine Motel (where MLK was shot) is a real piece of history - we didn't have time to do the whole museum but they have free audio/video kiosks in the courtyard that give you the whole story. Also agree on the ducks at the Peabody and the Bass Pro Pyramid, both something you don't see every day. We spent 3 full days and loved it. Headed over to Nashville afterwards since we were in the neighborhood (well, 3 hours or so) and had a great 3-4 days there too, I can give you some highlights if you're interested. Have fun!