Agree with above there are tons of old threads on this. Use the search function as there literally dozens of them. Pick the date that works better with your schedule. Something to ponder... Early Sept the Plebes are 2-3 weeks into the academic year. They are your hosts. Their experiences are still limited, they are still coming out of the haze of Plebe Summer, and are many are still figuring out the whole ac year. Mid Nov the Plebes are now a few weeks out from completing the first semester, so their experiences are greater and probably a greater variety of opinions. They will have a greater more informed view of usna at this point. With that being said it's 2 weeks from their first trip home and most are pretty tired and anxious to get home. So you might have some cynicism too with the tired and stressful year adding up. So pros and cons to each . Early sept can still be hot and humid, if this is new to you, might be a good chance to experience what plebe summer weather can be like. If you are a San Diego kid fall is pretty awesome on the yard. If you are truly usna or bust... Then either date is probably ok. If you are torn or really trying to line up decisions early might be better.
