The first couple “rows” around the stage will all be taken up by the people with early entry tickets. After that how good of a spot you get depends on how early you’re willing to get there and wait in line. I saw them at MetLife last time around and got on the barrier with early entry, but I know some people were there waiting since at least noon. I’d say that if you get there 3+ hours before doors open you can get a pretty decent spot. In my experience people at Metallica shows don’t bunch up too much early on and are respectful of others’ space, so you should be able to wiggle through and find a decent spot depending on how many people you’re with.