Here is the itinerary that we're think of after flying from the US
London for two nights, then take the train to crewe station where we'll rent a car. From there we'll head to Betws-y-coed or Beddgelert for 3 nights. We'll stop to visit Bodnant Gardens on our drive to Keswick in the Lake District of northern England, where we'll stay for 3 nights. We'll then head to Lawers Scotland for 5 nights, before sending out final 2 nights in Edinburgh.
My question is: Is adding in Betws-y-coed and Beddgelert too much when we could just take a three hour train ride out of London right up to Keswick?