They will probably be fine if you integrated now. Our 6 month old domestic turkeys and 8 week old wild/royal palm crosses, have been together for about 3 weeks and get along great. They were integrated slowly; for a week we put the little ones in the chicken trailer in the corner of the turkey barn, then under careful supervision we let the little ones out with the hens (only one hen at a time) in the barn. The hens were very curious and pecked at them a few times but overall it seemed as though their maternal instincts kicked in. Then the little ones were let out at for 4 night in the barn with all the turkeys. After they did well at night, we let them go. The three toms barely notice them, even when they're running between the Tom's legs. The hens are very motherly with them, watching over them to make sure they don't go too far and showing them all their favorite spots to forage. I was concerned about letting the little ones out with the big ones but the little ones are learning the rules of the property, their boundaries and also what is safe, like us.
I may have been a bit overly cautious, but I think allowing them to integrate at night with toms and hens was important to everyone getting along.
Let us know how things go!