No great advice

The guys I know who have had a tailgate in the same spot every year for decades now have done several different things. First few games, they set up their tent (put half way up) and a table at their normal tailgating spot. That was frowned upon, so now they go and get in line fairly early to get in the lot (6:30ish) with at least one other guy who hikes the tent in and sets it up where they always tailgate.

They have had security present to prevent people from entering the lot as early as 5. Security has spoken to the guys and told them not to leave stuff out early.

If you get to the lot early enough, you can park wherever you want. No guarantee you'll get adjacent spots, but hopefully close to where you want to be. After that, they do zipper parking.