Katie's leg going numb

We just returned from a trip to visit our son and his family. Usually, we take our 2011 Sienna. However, due to the chance of bad weather, we decided to take our 2003 Toyota 4Runner. The trip is about 360 miles each way. Usually, after 150 to 200 miles in the Sienna, I have to stop and walk around because of numbness in my right thigh. I attributed this to my age. However, in the 4Runner, I didn’t experience this numbness. The 4Runner sits higher and the seats are firmer. Everyone has different needs, but for me a high seating position and firm seats are best.