Yes, I've heard Andy (in particular) and Bob talk about wild camping in that area. I'm pretty sure they often use one of the Hollows, probably Ashes Hollow or Callow Hollow, although they're never very specific for obvious reasons.
They also tend to be tarp camping, and relying on the notion of "arrive late, leave early". Just how practical that would be with a tent and a youngish lad I'm not entirely sure, especially if the weather takes a turn for the worse.
I think the Arans suggestion, possibly from Cwm Cywarch or maybe heading in from Bwlch Groes, might be more feasible. But then some parts of that involve terrain without much path on the ground, which may or may not be ok...
Yes, it looks like a Kinetic to me. It's not quite clear from the photo but is there a slightly curving horizontal seam across the front at about mid height, immediately below the bottom of the zip?
I've still got a couple of the blue ones with the grey side panels, bought in about 2006/7 iirc. I use them for cycling - they make great tops for autumn to spring, close fitting with a nicely shaped rear hem that never seems to ride up above your shorts, comfortably wind-resistant but they also shift moisture away from you rather superbly.
I never did find a use for them in my hillwalking kit. (Although I'm sure I saw Frank up several hills in one).