While hotel reservation services like Booking.com or services like Tripadvisor do not yet give options in Tocantins, the best way to find a hotel or pousada in Tocantins, is to google. With Google you will see that most of the towns have some pousadas, and you can make a reservation by calling.
Website with list of pousadas in Tocantins: http://www.apontador.com.br
Website with very limited list of pousadas in Tocantins but with price indication: http://www.mundi.com.br
At www.palmas.org you find a Hotel Review for Palmas.
