I always desperately want to dream of him as he is sooooo present and ral in my dream. After he died it took ages to settle on a memory of his physicality my brain was happy with, so I couldn't even recall really how he looked. My first dream solidified that - he was around 60, pre illness, younger than he was when he died. I've had four dreams in 18 months. I wish I had more. Perhaps it's because I think of him so often in waking life I don't dream about him. I hope you dream about them soon.
I tend to just imagine Ive spoken to Dad. That helps. Or tell him things whilst I'm driving alone. I know I'm talking to myself but it helps. Or I just imagine what he'd say and say it aloud to Jamie in present tense like 'Dad loves this' or 'Dads here' ... Jamie gets it. He misses him too. I have come to treasure thinking about him and missing him as it feels like he is here. Better than his complete absence.