You are fine pretty much everywhere but POLY and to an extent VGF.
BCV and that area wasn't bad at all staying there. Even the skyliner that we took in the evening wasn't bad except for when the boats went down and the skyliner was then overrun and it was a 30 min wait per the CM. (We had went to AOA for dinner just to randomly try it that night and was pleasantly surprised in quality)
We have been on the 4th multiple times post COVID and stay in both the Boardwalk and Monorail areas.
My suggestion is simply not to have a rental car with DVC unless you are at one of the resorts that essentially require it like AKV, SSR, OKW. Just catch a couple ubers and even get a towncar for airport pickup.
The issue with VGF over the 4th was mostly that the monorail was always full, especially the closer you got to fireworks time. I have never seen the line for the resort monorail be as long as it was around 7PM on July 5th this year, but I'm sure that's nothing compared to how it can get.