If you get a stubborn spot a heat gun works pretty well , most of the problems I have seen with oak was the checking of plywood not solid pieces.
I have built bows from oak and used the heat gun , sometime you have to soak it for a few minutes . we made re curves on bows this way . another way to steam simply is a tea or coffee pot wrap your wood in tinfoil and set it where the steam coming out the spout is directed under it.
Ron