The best choice is the car park at the rental car parking area

One of the nearby parking companies, such as Qwik Park, US Park, and Park and Go. Which all have transpiration vans.

2 hours prior to flight. TSA can be a nightmare

Yes cell lot off eureka is my favorite

I usually show up to the airport 3 hours before. It also depends on what time your flight is. If it's in the afternoon show up 5 hours early . But if your flight is early in the morning at least 3-4 hours

Absolutely, it is. Delta's gates are all located on one long concourse with an overhead monorail that travels nearly the entire length.

Nope, you have to smoke outside.

The restaurants are mostly in departures, but there are vending machines and a few small stores in arrivals where you can get food.

Shuttle available from ground floor

The issue is because you were arriving. First class/Delta One international passengers only get lounge access upon departure, not arrival.