Still pre-check lite. The bag scanning people don't like candy or food. You need to place packages of candy/food in the bins if you don't want a secondary inspection of your bag.

There is a pre-check lane and a regular lane but usually only one TSA person so he/she alternates taking people from the lines. AS flights at 520a, 715a (stops in Ketchikan), 729a (to Anchorage) and 8am so you will have some AS people mixed in with the DL flight. I usually don't arrive until ~55 minutes before my flights but that's me; since you are returning a rental car and it's summer with a lot of tourists who may be slow in the line I might be inclined to recommend that you get there at least 60-70 minutes before..