Yep, that's about right. Hope for some good tail winds!
However, when you look at airfare, the savings are huge, even more with each extra person you bring. DW and I are driving down in a few weeks. 2500 miles round trip and budgeting $500 for travel (gas and 2 hotels nights). Airfare would have been ~$900. To help save $$, we are bringing a small cooler for lunches and snacks. Healthier and cheaper than road side eateries.
In the end, if we plan well and have a wonderful relaxing time, we will remember the trip and not the extra $120 we had to pay in gas because Wall Street speculators are allowed to artificially manipulate fair market price. (The following was a paid opinion).