The grasses you selected are not native, but they may in fact be OK depending upon what you are trying to accomplish. They certainly aren't registered as noxious weeds, but then there are a lot of things that are really bad that aren't... yet, which may be something you don't want to deal with later.
I am no expert on establishing native grasses. In fact, I am currently doing an experiment where I hope to re-establish a few small meadows. It isn't easy or cheap to do, nor should everybody just be expected to attempt it, much less punished if they don't succeed. I just wanted to learn how to do it.
What I can tell you is which natives seem to grow well by location, depending upon soil, competitors, water, and weather. I can also tell you which natives compete better with weeds. I can tell you who the good vendors are. I don't know a vegetation contractor but I know those who do.
Let me know if I can help.
Thank you. I will be too busy next week to do much of anything about it, but after next weekend I'll be able to sort it out. What I want to accomplish is to keep my orchard producing grasses for my goats to eat, and this mixture of seeds are supposed to grow at different times, thereby providing a somewhat continuous cycle of sprouting. I wish I'd thought of you before I did this. [Stupid stupid stupid.]
I'll get in touch with you in about ten days and see if you can help further.
Truly........thank you.