im at queens, and ive got a place there, though im staying in toronto lately...
aside from west49 in the suburban mall, there is only one shop:
http://bighouseskateshop.com/its a university town, so they are mostly about clothes, but they have a decent selection of decks, shoes, vids, etc. a good mix of stuff: same people behind 'top of the world' in ottawa, ive heard.
if you have any questions about kingston, just shoot me a message... oh, kingstons not much for skating, but theres a few decent ledges at queens, if theres no snow and ice. if you are driving out from toronto, let me know-- i can tell you here there is an 80 foot long smooth, concrete bank to ledge setup between the two cities.