We are taking a trip

We are taking a trip by car in a few days to see my life partners father. I always love going to visit him. He’s such an awesome man. It takes 5 hours to get there though and I’m anxious over the car ride. My legs get really twitchy when I’m in the car for long rides. Last time we went down there my chiari symptoms were very minimal and now they’re quite moderate. Does anyone have any suggestions or advice on how to handle being in the car when your legs get like that?