What bike for North Wales

Going to be in North Wales for a week on a family holiday near Conwy. I'm planning to take a bike along and get some rides in where I can, options I'm thinking of: Conwy mountain and surroundings, Penmacho, Gwydir. I've not rode any of it before.

Bike choices are xc bike, long travel trail bike (with stickier tyres etc) or eeb (more trail than enduro). I was leaning towards the xc bike, but any knowledge appreciated. I've heard there is some spicey off-piste in Gwydir, but I enjoy that sort of thing more in a group, and as I'll be riding by myself I'll likely by sticking more to the trail centre stuff down there. Thanks!