Just chiming in to agree with the others and to point out that 5 are now allowed in a 1 bedroom if you want to provide an airbed for the 5th. For the points and the size difference, I would definitely go for a 1 bedroom at OKW over a regular hotel room at POR with the smaller beds and tight space. Besides, in the 1 bedroom, you will have a full kitchen and laundry room and that whirlpool which would be like icing on the cake! Of course, if nothing is available at any DVC resorts for the time you want to go, then that would be a horse of a different color.
For example; in October a room at POR would be 85 points for Sun.thru Thursday while a 1 bedroom with all the amenities at OKW would be 90 points for that same time. I'd definitely do the 1 bedroom.