So I did end up booking with
Budget through
UT. Because for less than $700 I got a minivan for 10 days during spring break. Everyone else was $1400+, even through autoslash.
When booking there was no place to put my fastbreak number.
I was able to enter my confirmation number into my fastbreak account so IDK if we'll have to deal with the counter or not. Hopefully not, but at least one of us can deal with that line while the rest of us wait for luggage.
And YES we will make the trek over to Terminal A to grab a visitor toll pass. Even though it's on the opposite side of things, we'll need to burn some time for the car and luggage and it'll be worth not having to bring a roll of quarters and stop at 4+ toll stations. We will have had a practice run at that because DH and I are going on a trip in a couple of weeks and plan to use VTP for that as well.