Accomodation varies from 250 baht pr. night for a bungalow with bath & sit-down toilet up to 350 baht for the bungalow placed almost on the beach. Since the restaurant is most reasonable, you can look forward to a reasonably cheap vacation. To give an illustration: We stayed 1 adult and two children (boy's, 9 & 11 - eating grown-up portions) for approx. 1.000 baht /day including everything (room, food, drink etc.)
We visited Luboa Hut in beginning of March (still high season) and we were the only visitors there - so you should be able to get accomodation without reservation.
Since there is no electricity on the island, there is no on-island email-service. An & Nut check their emails only when they are in Krabi:
An email: krida_c@hotmail.com
Nut email: manut_n@hotmail.com
If you however want to be 100% sure, you can call An on her :
In thailand: 01 388 9241
International: (+66) 1 388 9241
If you need additional information you can send me an email (adam@toensberg.com) - I will try to answer as fast as possible - please remember, I have no part in the resort - I have just visited the place and made a website for them because I like them.