There are 4 pools at OKW, each "neighborhood" has a nice pool, sandy childrens play area, and hot tub, but only the main pool has a slide and a sauna built into the base of the lighthouse.
The near Hospitality House (the main pool area) is a separate booking category at OKW, just like preferred ad standard at BWV, except the points are the same.
If you are not in the near HH category, bldgs 62 to 64, 15 and 16, and 27 to 29 are also fairly close to the HH area. However, bldgs 62 to 64 are the only bldgs at OKW with elevators, and are often needed for mobility impaired guests.
The buildings in the booking category are 11 to 14 and 23 to 26.
No matter where you are in OKW, it is, at most, a 15 minute walk to the main pool (really closer to 8 to 10 minutes). There are 5 bus stops at OKW, and HH is the last stop, so you can hop on any bus to go the HH area if you don't want to walk. To return o your room, walk across the bridge to the bus stop near bldg 26, it is the first stop on the route, and you can board there to return to your room. Either way, it
may be faster to walk than take a bus.
Here is a map: