I'll probably come and join you all on this. Shouldn't put too many miles on the car either.
Where are you planning on heading to? I can help out with some fantastic route options if needs be.
EDIT- Just seen the proposed route up Llanberis pass etc. Seems a shame to travel so far along the A55 just for some tunnels but I suppose it gets you to Llanberis fast enough.
Llanberis pass is notoriously rough but a great road, from there you can
either- head down NantGwynant pass into Beddgelert, take the A4085 towards PenrhynD, then the B4410 to Maentwrog (stunning road with lots of twists and elevation changes and a pub at the end for grub :wink: ), up to ffestiniog and then over the Migneint towards Bala before taking the B4501 to Cerrig to hit your EVO triangle (which is grossly overrated by the way).
Or for a faster alternative after Llanberis pass head down into Betws then up the A470 to Blaenau (super fast/smooth road that's like a track) before again hitting the Migneint/Bala/Cerrig.
B5105 from Cerrigydrudion to Ruthin is mega as well (as is the A494 that would take us back through Mold to the A55 Queensferry start point). 8)
Just some options borne of local knowledge, not wanting to interfere though if the route is planned. :?