A/C stopped working.  There is no blower sound nor any other sound coming from the unit.

Is it possible that when it was working last week you were at a full Campground with inadequate voltage? If so it could have damaged the starting capacitor.
 

Ducted A/C Ceiling Vents?

My ducted AC has a "Chill Grill" which has louvers that can be opened to rapidly cool the main living area. I don't know if this can be added to your AC, but it does a great job.

Air Conditioner hums but it won't come on

Any dealer for your brand AC should be able to repair under warranty. It may have been run under low voltage which could cause the capacitor to fail. Do you use a voltage meter in your rig to check for adequate voltage?