I am also prone to motion sickness, especially on stop-start car rides, and I have no problem on the Safari. It is bumpy as PP mentioned, but slow, no hair pin turns or anything like that. We have done it right after pre-park opening brft at Tusker House and had no problem. It is one of our favorite experiences at Disney, so I wouldn't skip it. Seeing the giraffes and elephants is awesome, and we've actually caught the male lion sitting up a few times, and pacing around once at the end of the day. If you are worried about the eating part, try to wait longer afterwards to ride, or ride earlier in the day if you can(earlier is better for animals being active anyway).