OK, why do you want P'burg in particular?? How familiar are you with SXM? P'burg is not a very good place to be at night, in most cases. As far as early check-in, that would have to be something that you would have to see about directly with the hotel. That would be the WORST day of the week to expect an early check in, unless you pay for the night before.
The only hotel in P'burg I could recommend would be Holland House. They do have a restaurant there, a pretty decent one, so you wouldn't have to leave there at night. It is walking distance to shopping, yes. Not sure what type of shopping you are interested in? What type of amenities are you looking for at the hotel, or just a place to lay your head?
