Just be careful. The dead can be a lot to handle for some, and almost as a rule those closest to us who have passed will be the most difficult (painful) to work with.
I dont want to enforce on you too much of my own beliefs, but once something crosses that veil they are not the same. If not just for the pain of seeing him again (which will be immense and raw), he might also not be as you imagine. Some people when they pass do not handle things well, and can become twisted in all sorts of horrible ways.
Since I have developed these practices luckily no one close in my family has passed, but the most difficult experience I have had was when my first love (an ex girlfriend) hung herself. I do work as a psychopomp, and I approached her to make sure she passed correctly.
It was terrible. She was not who she was while alive. She wanted her family and all around her to feel her pain too. Had I not had experience and been prepared I could have been in serious danger as she attacked me.
Now, its not a definite thing at all that it will turn out badly, but you also sound like you dont have experience with this. I just want to suggest you to err on the side of caution, and be aware of how it could potentially go wrong. The dead are dangerous things to be around, and not many can handle it.
Although seeing them in dreams in a non-dangerous manner makes me think it might be ok.