Cloud access doesnt take long (maybe an hour in total at most?), and i'm sure could be arranged as a field trip easily enough.
Ideal for UoP field trip i'd think.
Rather more challenging and complex would be a visit to the parachute seller - try the cloud first i'd think.
PF book 1 is probably better left to other organisations, as its not really a trip for an inexperienced mob.
Other possible suggestions ...maybe Phineas would be kind enough to show people round his island ? A tour of the castle, and of course the petting zoo! would probably go down well.
Colmert's castle might be another option for a field trip.
Umbrion's castle, while an interesting archeological site, probably isnt suitable due to the hazards of its location.