I study archaeology in York, and yes the kings manor actually has Medieval origins (it is in the centre of York afterall). Im a first year student and i've found the course to be very enjoyable. I have 5 hours contact time per week, this term for example i have a lecture on monday, a lecture and a seminar on thursday and another lecture and seminar on friday. The work load is minimal compaired to other subjects but you are expected to do a lot of outside reading and general work outside the subject. Your first year also doesnt count towards your final mark which takes a lots off a lot of preasure.
I cant say i know much about the 'historical archaeology' course, infact i've never even heard of it until now, but if you have any other questions about the archaeology aspect just let me know.