Makana's place worked out really well - the studio is laid out well, and air circulates easily. Be prepared for ample rooster/chicken noise early in the morning and all day long - typical Kauai! The place is not far from everything you'll want to do on the north side - Anini beach is very close (Makana has snorkel gear and towels for you to use - I recommend it!), and Hanalei is also close (when the roads aren't closed due to heavy rains ;-)
Makana responds very quickly, and had great suggestions for us. We enjoyed our stay!