Dazu involves a long walk, but is easily accessible. No high flights of steps, except for the temple at the top, which can be missed. I was there in March and it was virtually empty. I also have a hard time with steps. They may have battery operated golf style carts. You need to inquire. The site is fabulous. Well worth the effort. I cannot comment on the museum, which is closed on Mondays, a detail my tour operator China Highlights had regretfully overseen...