Eryri circular route and wildcamp

My boyfriend and I are desperate for some solitude and time in nature. Ideally, we'd park the car somewhere in Eryri on Friday afternoon, walk a little bit and pitch the tent for the night, then continue for a longish hike (potentially another night's camp?) the next day and back to the car.

I'm looking at Nantlle ridge but finding it hard to estimate if some of the routes you find online are too short or too busy ... Would just love to hear about your weekend hikes in the area, bonus points if you have an OS map / alltrails link! 💚