You can put small stocker HBG, CC and CNBG in at the same time as adult FH. They will all be about 2in. long.

You should think about and be sure you want to put HBG and CNBG in the same pond. I would not do that. It is one thing to manage through that situation but another to create it on purpose. They don't do well together for a number of reasons both genetic and competitive.

The FH , HBG and CC is a common approach to a put and take fishery. The idea being that you put them in , feed them to eating size and catch them out. Then you replace them with new fish and repeat.

If you elect to use CNBG you will need a predator in addition to CC to control the CNBG's high reproduction rates.

Stocking rates depend on the goal. For example in a BG/LMB pond the stocking rate for BG is higher than for HBG in a put and take pond. Different goals, different rates.

Tell us what you want (goals). Then stocking recommendations will follow.

Dave CNBG are at about their northern limit at the Okla/Kan border. Ok City will work but maybe not as good as regular BG. If they are from Dunn's they are the Ark variety of CNBG and they may be more cold tolerant , we just don't know.