If you don't feel quite up to the Rock Island Trail then you can try the Rim Trail. The Rim Trail is a .7 mile paved trail with interpretive signs informing you about the plants and animals in the area, the formation of Walnut Canyon starting 265 million years ago. The trail is flat and wheelchair accessible.
Although the Rock Island Trail is only a one mile loop it descends over 185 feet and is quite steep in places. The trail hugs the cliff and has 240 steps. Make sure you are ready for the trail and pace yourself. If you are from a lower elevation, also keep in mind that you are at about 6700 feet. If you take these precautions, the hike is well worth it. The cliff/cave dwellings are very interesting and the view spectacular. When I visited there had been a rockslide so I walked .7 miles to where it was blocked off then .7 miles back.
Equipment: Good walking shoes, sunscreen, clothing appropriate for the weather, plenty of water, a hat.