I stay with my family when in Anglesey...
but seeing as they won't be able to fit you all into their bungalow I think we need some alternative information.
As a "resident" of Anglesey throughout my childhood (and indeed my adulthood as I spend a lot of time there each year), I'm pretty well qualified to discuss Anglesey and its accommodation.
If money is no object, there's the Anchorage Hotel at Four Mile Bridge (my aunty is the receptionist there), the Valley Hotel and Bull Hotel in Valley.
If B&B's are more your thing, there are hundreds of B&B's - if you PM or email me your requirements then I can get my relatives to get the latest information.