[Valerius]

Yes, that is correct - no indie recruitment at all. All units should be national units from your three forts and any additional forts you conquer. Cap only troops should only be available in your cap. The other forts should only have the units available that your nation can normally recruit outside of your capitol. So, if you are seeing cap only units available outside your cap that's a bug and they shouldn't be recruited there.

I think units from lucky events are ok since they can be difficult to get rid of and you'll have to pay upkeep on them.

Important note, though: if you get a free fort from a lucky event it must be torn down!

Also, please remember: no mercenary recruitment.