We will be arriving at LHR around 3:15 in the afternoon. We will pick up our car so we can "enjoy" rush hour traffic. Would it be realistic to get up to the Cotwolds and find a B&B that afternoon/evening? We'd like not to reserve a room beforehand. We'd like to drive and explore where we' like to stay (3 or 4 nights) before going on to Wales. Any good suggestions on where to stay the first night? Thanks!