I only plan out the event. How you react to the event, and how the event plays out are based upon player decisions. As far as the Wyvern, both of you are from Ivalice- where dragons aren't really good company... Erion has a better chance in time, but the only reason you guys were on it in the first place was because it was charmed. It'll be a little while before you two are to that point. And as for learning from the mount, XP will be given out after the events of this camp, so do with what you will... Within reason >_<