When we visited Kauai, we stayed at the Grand Hyatt in Poipu, which is located on the south side -- aka "sunnier side" of the island. It's definitely a trek up to Princeville but we had a car, and it was so nice passing through the Tree Tunnel each time we drove out for an adventure.
We were upgraded to the most impressive suite I've ever stayed in. So if you are planning a trip to Kauai and decide to stay at this hotel, book a room with an ocean view and make sure you request the Deluxe Suite 6127 in the Shipwreck Wing -- I promise it's the best! It really made our stay in Kauai special. Plus all the restaurants in the resort are incredible.