
Forseti |

I'm not aware of specific PFS rules for dealing with flying mounts. Last I checked, roc was an allowed companion type, so to the best of my knowledge the rules default to regular Pathfinder rules.
A roc is medium sized at that level. A small creature like a gnome should be able to use it as a mount. A riding saddle for an exotic mount is all you need to fly without any issues. Ride checks to avoid falling off can be difficult at low levels though.

zza ni |

cast ant haul on it. get triple the effective carrying capacity for 2 hours/level.
if you grab something that increase ur caster level or extend duration (like this trait) then you get to spend a lot of time on him even on level one.