I am in the same boat for much the same reason, the company national sales meeting, staying at a lesser property in Orange County to keep cost down.

Find a FI or CY that has a cheap weekend rate, check in and head on out.

I can't find much under $80 in the Richmond area, but 15k points makes it tolerable. Perhaps your company rate will be less, or you can try the Norfolk area once the government contractors stop visiting the area.