They should.
We are members at OKW and stay on points. We have still called them.
When you call, it would be a good idea to know what height for the bed is best or you, rather than just saying you want a higher bed.
If it would be better, you can actually rent an adjustable hospital bed - one of the places I know rent them is Care Medical.
http://www.caremedicalequipment.com/
You can deal directly with them or thru Special Reservations.