Hello Marcos
If you want to carry both private and regular VLANs across a trunk, the best thing to do is to simply configure the trunk as you usually would, allowing all of the VLANs, including regular, primary, community, and isolated VLANs. Don’t use any private VLAN configuration on the trunk itself. As stated in this Cisco documentation:
Note: Trunk ports carry traffic from regular VLANs and also from primary, isolated, and community VLANs.
Also, as stated in this documentation when you configure private VLANs across multiple switches, they are sent just like any other VLANs, but they must be manually configured on both switches, or you must use VTP3 which supports private VLANs.
Finally, if you use a promiscuous trunk, you must keep in mind what such a trunk does to the VLAN IDs when they are sent through it. The following Cisco community post describes very clearly what happens in such cases:
I hope this has been helpful!
Laz