Same here, plus drifting. The girls are not coming out of their coop today, and I even shoveled a path for them!
I'm glad you're keeping the disadvantages in mind, anyway.
For some reason, it didn't quote your entire post, but I wanted to answer about frizzles and such. The gene for frizzle is dominant, and so any bird that carries it will appear as a frizzle. It should not pop up out of nowhere. Like with blues, the gene is partially dominant. Breeding a frizzle to a frizzle will give you about 25% smooth feathered offspring (and 25% curlies, but I won't get into that here) and you can't tell with them until they grow out some feathers whether they will frizzle or not. (Oh, and you're thinking either Black/Blue/Splash or Lavender. Lavender is recessive and breeds true, but BBS is partially dominant and does not.)
My Silkie, Marge, seems fine in the flock with the LF girls, but then there are 36 other birds to distract them from her. Every situation is different, of course, but if I were you, I'd have a separate area to keep them just in case your current girls don't like them. Even just tacking up some fence to create a barrier in the coop would work, and then the other hens could get used to them being there without being able to harass them.
So... Is everyone getting chicks from Brad this year?
I've already PM'd him about Legbars, myself.