During this time of the year the North rim is probably closed for snow and getting to the South rim might be a chore depending on the weather conditions there. From Phoenix it is approx. a 5-6 hour drive on a good day. The last time I visited the Canyon it was all shuttle service to the look out points. I have also done the helicopter thing. It was expensive and lasted approx. 30mins and they are not allowed to fly into the canyon. Arizona is an open carry state...pretty much anything goes as long as it is openly displayed.