Caernarfon keeps the castle and your evening in the same town. The Black Boy Inn is a useful comparison for a historic inn stay, especially if you want to return to your room before dinner. Confirm which building contains the room rather than assuming every category is in the original inn.
Good for: A castle-focused overnight or two-night town break.
Before you choose: The historic setting can mean different stairs and luggage routes. Public parking and any limited hotel permits need separate arrangements.
Menai Bridge is worth comparing when the castle sits within an Anglesey and mainland holiday. The Anglesey Arms gives you a concrete inn option near the strait, allowing another day to focus on the island side. Keep the castle visit separate from a long coastal circuit.
Good for: A longer break divided between the mainland and Anglesey.
Before you choose: You need a separate journey to Caernarfon and must allow for bridge traffic. The hotel name does not place it inside Caernarfon.
Llanberis changes the holiday to an inland base with the castle as a day out. Choose it because you want time around Llanberis itself and have a realistic travel plan, not simply because both destinations appear on an Eryri itinerary. The Royal Victoria is one larger hotel comparison.
Good for: A countryside-led holiday with a historic-town day.
Before you choose: Do not combine a demanding mountain plan with a rushed castle visit. Room bathrooms and access routes vary at the hotel.