We've been to the canyon many times and love the North Rim for peacefulness, but for a first-time visitor I would suggest the South Rim, rather than North Rim. Stay inside the park at Trailer Village - full hookups - and the free shuttle stops right outside the campground entrance. You can ride all day getting on & off whenever you want. The Rim Trail is excellent for easy walking using the shuttle. To get a full canyon experience, hike down the Bright Angel Trail at least for a short distance. It's an awesome feel to get below the rim but remember that hiking up is much, much harder! Have a great trip!!