Agon:
Agon can cast a cheap, 10 min long ritual to give the group fast flying mounts for 12 hours or so. He doesn't have access to a ritual to scry into the settlement from so far away, though.
@GM : do you allow taking 10 on rituals ? also, how long does it seem to be until nightfall ?
If the DC is 30 or less based on your Arcana skill of 30, you can assume success and that you took 10 for a tota of 40, yes. If the DC is higher than 30, then no.
FYI, my posting may be erratic for a few days as I care for my youngest who is in the hospital being treated for an infection around his eye. As you are likely several real-world days away from combat, this presents no real difficulty, but I thought I would let you know.