I am also getting my first quartet of geese in 3 weeks 4 days. I am so excited, but also have Canadian geese who come to our field/pond. Currently 4 pair with two different hatches and their visiting relatives.
I asked about the interaction also. I was advised to not bring the goslings down to the pond until the geese have left due to aggression/guarding their own, parasite exposure, and the possibility of avian influenza. Next year I believe that they will be able to handle everything better due to being older and larger than the CG. I am only passing on the advice that I had previously been given since other than research and asking questions, I have no real experience with geese yet. Good luck choosing geese or ducks.