I'm not sure if mixing trout and bass is optimal, if you want to grow big ones of either species. If you only want diversity, then I think it would be ok. Since I know you said you watch the Wooded Beardsman on Youtube, when they were doing that long hike to find that unexplored lake, they kept mentioning that if they started catching bass, they knew there wouldn't be any trout in the lake. I'm not sure the reasoning behind it, but its just something I remember.
I also found this little snippet on the internet:
Can bass and trout live in the same pond?
Small trout can be added to bass ponds in fall while the water is still warm enough for the bass to be active and cold enough for the trout to live. They then serve as an outstanding food source for pond owners looking to grow big bass.
