From what I know

So how does it work in hunt parties?
> Something like Odin FATE, the more people you partied with to deal as much damage the better chance for you to get gold. For hunt's case, you get the maximum reward depending on which mark you defeated (A or S).

Do you stay in one zone or teleport around?
Some do either while others both, everyone split up to various areas to look for them and then announce the location once they have discovered the whereabouts, then everyone will proceed to teleport to the location specified.

What are the seals per hour?
Depends on the timing, if you're lucky enough to have several of them spawned within that hour then you get more per hour. Someone in my FC said they managed to get 200+ within an hour.