From Havasu City, if you're that close to the Grand Canyon definitely take the time to go there. The South Rim is where you want to head in the Spring. The North Rim is much higher elevation and doesn't open until later. Don't bother with the Sky Walk on the reservation - it's not even at the main part of the canyon and it's very expensive. Go to the national park itself and stay at Trailer Village near the canyon rim for the best experience. Park and pick up the free shuttles just outside the campground entrance and you can ride all day long and get off to explore whenever you want. From Havasu City head to Williams and turn north - easy to get to and well worth a visit!