I've been off the net for 3 days and it's taken a lot of reading to get back up to speed with what's been posted here.
Some background info for a start. Streetlighting: in Powys, it's been predominantly low-pressure sodium (SOX) - which gives monochromatic orange light - for decades. Only in the past 10 years have some high-pressure sodium (SON) started to be used. This has a yellow/pink colour. On some housing estates (especially some of the rougher ones), white LED lighting is now used in a few places. Thus, the lighting near the garage, and near the place where April was abducted, could be either one of these lighting types. Without going and having a look for myself, I couldn't say which type is in use. Streetview is no use, as Powys CC could well have changed the lamp since Google went round with their car.
Under SOX lighting, a blue vehicle would appear pretty dark. The only vehicle which would show up cream would be a light coloured or white coloured vehicle. Even then it would appear orange. Under SON, a white or cream coloured vehicle could show up as cream, sort of. Under LED, you'd have a much better colour rendition.
In terms of dark/dusk, from memory, the sun would have set by 19:30 that day, but there would still be daylight from the sky. There wouldn't be much, but it wouldn't have been completely dark. Dusk fits the bill.
As far as the estate goes, it was originally built by Powys CC, so local authority council housing. The houses which hadn't been sold to owner-occupiers would have been transferred to Clwyd-Alyn Housing Association some years ago. Powys CC has very little council housing stock left. I wouldn't describe Bryn-y-Gôg as a ghetto estate. OK, it has a "community office" and I think a credit union office (same building), which are usually signs of a troubled area, but I've parked there a few times without worry, when I've gone to do my railway photography round the corner at Garth. In terms of council estates, it's actually quite respectable, and not in the same league as Treowen or Maesyrhandir in Newtown, which probably are best described as Beirut on steroids.
As far as Talyllyn lake (the "fishing lake near MB's house") is concerned, as far as I'm aware it hasn't been sonar swept yet - there's been nothing in the local media about that, which does surprise me. Assuming that April has been dumped there, any perp would struggle to get her into the middle of the lake, without rowing a boat out in the middle of the night in pitch darkness. The best anyone could do is to throw her from the roadside, and then you'd not get any farther than 10ft out. Reeds flank the southern shore of the lake. There's also nowhere discreet to park to carry out such an action - it's a case of pulling into a roadside layby and do the deed. But at 3am, nobody would be around to notice.
Sadly, there's a million and one places April could be hidden away, and without any solid intel, LE face an uphill struggle. As I posted on one of the previous threads, unless someone else is looking after her, it's doubtful she'd have survived one night out in the open. An adult would struggle to survive out in the exposed wilderness of mid-Wales.
That's assuming she hadn't been driven to a road interchange somewhere over the border, and got whisked away by someone else. Unless and until someone tips LE off, they'll never know where she is. And as someone else had posted, the local wildlife would've made short work of disposing of her, had she been dumped somewhere out in the countryside. In terms of "finding April," as this thread is about, then the possibilities of that are vanishingly small, sadly.