Rover Elves have developed a greater skill for healing, especially out in the plains. In the plains they can get a free Easy Medicine check to locate a needed herb to heal basic status effects such as low level poisons, dazed, fear, nausea, and sickness. If the rover elf is female they have had even more training in this and can add double their medicine trait score to any healing potions effects.
The rover elf probably learned how to ride before the elf could even walk. Because of this the rover not only needs no saddle (and prefers no saddle), but also will likely not fall from his or her mount. While riding a beast, the rover gets a +1d8 to Brace checks against being knocked off or falling off. The Rover also increases the mount's Move and Acrobatics by his or her own.
The rover elf grew up on the plains and calls the plains home. While on the plains the rover will experience no movement penalties nor will the rover experience power loss from sprinting. Furthermore the rover gains a + 1d4 to initiative while on the plains. Furthermore the rover elf gets a +3 to survival for looking for clean water and food.