Maybe there are a few evil drakes out there, making it difficult for the many good natured ones. I've heard of Turkey boys killing hens because they try to mount them but I've never come into contact with someone who's had that problem. I would give it a try Luke (Khaki Campbell's are notoriously good natured, while something like Muscovy drakes can be mean) . If you have a problem, it would show itself pretty quickly, I would think. My KC ducks weren't raised with chickens, but they get along fine with them, even my Sebright bantams (who are tiny).
I've found some Peachicks for sale on farmstock, I'm seriously considering them, though I wasn't going to buy any more poultry...
It's hard when they are such lovely animals.
I would love to have peacocks but hubby has banned them as they are to noisy. Shame you are so far away I could just drive by and admire yours from a distance lol.