I agree with you Tom, I have often mentioned a tour bus which calls at each location but have always had the same answer "it costs too much".
I also agree with your post 36. If you look at the Web site you mention
http://www.aboutdoverkent.co.uk/ things-to-do/ it has a nice picture of the Castle and the White Cliffs but no pictures of the other places of interest and no web site links to those places.
Howard you are right about the tourists entering Dover and of course the location, but you have to ask where do the cruise terminals visitors go and are encouraged to go by staff employed to assist their visit to the port? The answer is to Dover Castle if we are lucky or off to Canterbury even London and the coaches are sitting at the terminal ready to take them.
I love Dover Castle and visit there myself but I am sure a lot of visitors to the Town think that is all we have to offer so once they have been there they do not look much further.
I have been into the Roman Painted House twice in the last couple of years and on each of those occasions there have been but one or two people there. The R.P. House may be in the Centre of Town, but it is still tucked out of the way if the visitor has no knowledge of it or is not encouraged to visit it. I may be wrong but I would put money on low visitor levels being part of the reason behind their decision.
Whatever the reason, it does not get away from the fact that the smaller attractions need help in promoting the attraction, then a way of encouraging the visitors to make that visit such as a tour bus going around each, even to far out River and Whitfield.