oak trees and mushrooms

I have been collecting acorns and sprouting them, I have to put them in containers since I have no place to plant them. How long can I keep hardwoods like this in containers? Do they transplant well or should they go in the ground as soon as possible? Have you heard of inoculating oak and nut trees with types of mushroom spoors that grow symbiotically with them to create a permaculture food forest?

Haven't heard of doing that with mushrooms, maybe someone else has, on the oak trees, a couple ideas. The trees should let you know when they need trans planting, but they may be stunted by too small of a pot, but potting up may help. I have seen trees in pots as big as 15ft so it can be done. Maybe my experimenting you can become the expert on this. Inoculating with mushrooms is usually done with cut trees, it may either not work or kill the tree, I really don't know.