Conference fee does not cover accommodation. There are more hotels in České Budějovice, for info see

For example:

Accommodation "Koleje PEDAGOG"

The newly built accommodation named "koleje PEDAGOG" has been offering since March 2015. Accommodation facility at Branišovská 1800 / 36a is easily accessible by bus (bus stops no. 3, 7, 15 and 53 in both directions). More info