I frankly never tried traveling with somebody that young. You can't hold them and they can't entertain themselves.
Our son was 22 months old when we had twin girls. When the girls were a year and a half we drove from Michigan to Florida, stayed a week and drove back. We went to the dollar store and bought a bunch of dollar items that would be safe for children, even things like plastic measuring cups, whatever, just to give them something to play with and rotated them between the three. Plus taking time for a couple of half hour stops for them to get out and run.
Not sure what you would do with somebody two months old though!