I'm exploring my options for my 17 days post a London trip. One thing I'm considering is trying to visit as many castles as possible (I have a background in history and warfare, and teach about castles every year), but I don't want to constantly be on the tramp. I would much prefer to be using public transport only - I'll be on my own, so don't really want to do the car rental and navigation on my own. I'm more of a university residence/hostel/B&B type of girl.
Has anyone else ever done this from more central bases, or even experience with using a central base? I'm looking at Northern and Southern Wales (was looking at Bangor in the north, Cardiff in the south), somewhere in Scotland (Edinburgh as a base?), and then perhaps some day trips or moving around in England.
I was also considering Germany, but am not entirely sure that this would be possible without a car rental, as there doesn't seem to be the concentration you get in somewhere like Wales.
I'm not just after castles, but good bases for general exploration. I'm not much of a point to point person, with a new roost every night.
Any opinions or experience with this approach?