Hawaii help please

Okay, i think i am need of some serious help. The wedding is fast approaching are FH and I are still totally confused about our honeymoon. We were set on Bora Bora/Moorea for the longest time until money became an issue. Now we have 'decided' on Hawaii but still want that Bora Bora type feel (quaint, tropical, relaxing, polynesian, cozy - not big city built up, would love a bungalow). As long as we can get this on one of the islands we will be happy.

Our travel agent is offering the Sheratons on both Maui and Kauai (5 days each). I saw the brochures and feel in LOVE with the Four Seasons on the Big Island. I know I can get my bungalow there! But it sounds really expensive. I know a few of the girls here mentioned they have been there and that I would love it - can anyone tell me what the room/bungalow rate is there? We would be going to this island solely to stay at this resort (there is nothing on that island that we really want to see) - is that stupid? Can we do 2 days there or is it just too much to travel all the way over there from Kauai?

Also, to make the trip more affordable, anyone have any recommendations for lower grade hotels (on Kauai or Maui) that might meet the description mentioned above? We don't need all the ritz, glam, and luxury of the big hotels.

Thanks so much everyone. We can use all the help we can get!