is it crazy to buy tickets to DFW now?

we have family in Arlington so don't need a hotel. right now roundtrip flights from PDX are about $450, leaving at 4:30 pm on 4/8. that doesn't seem terrible.

I might hold a rental car but doubt we'll need one.

My thought is to have family drop us off at DFW at about 7 am if not earlier. hopefully they can avoid traffic that way. And just watch from the DFW parking lots on the second floor. After the eclipse we can just hang out in the AC til our flight (or have lunch).

When we did the 2017 eclipse we could drive to it (about 1 hour, lucky us). The traffic before was medium bad. The traffic after was horrible. If you got on the road almost exactly as the eclipse ended you were ok, otherwise people spent 2-4 hours for what was normally a one hour drive.

Any other thoughts or tips?