Hi glaxicus,
I don’t know any specifics about the Sleep Science adjustable base other than what they have on their website so you may need to call them and find out any additional information you need and whether it has a wall hugger feature. Their adjustable bed appears to be good value I would certainly consider purchasing a Sleep Science adjustable bed from Costco if it compared well to the other adjustable beds I was considering based on features/price comparisons. If it doesn’t have a wall hugger feature then I would compare it to other adjustables that don’t have this feature which tend to be in lower price ranges.
The Northern Virginia/Washington, DC list is here but I don’t keep any records for adjustable beds that are available in stores in each area … only mattresses.
Phoenix