I’m planning to be away from home the entire time during Pesach. Must I still kasher my utensils that I leave home or is it sufficient to do a general sale of chametz?
There is no need to kasher utensils if you won’t be using them for Pesach.
For concrete chametz, and for concerns of chametz, one must arrange a sale of chametz. There is no need to do this for utensils (that are clean of actual chametz).