"MoaTrek staff will remain on site in Whanganui and Rotorua to continue offering assistance to affected clients."
A Waikato Hospital spokeswoman said three bus passengers remained in the hospital, but all were stable in a ward.
Three tourists who were injured in the crash were also still being treated in Whanganui Hospital.
A Whanganui Hospital spokeswoman said on Monday that the three tourists were in a stable condition.
Lakes District Health Board spokeswoman said two women in their 60s were in a stable condition in Rotorua Hospital.
Those at Taupo Hospital had been discharged.
Clark said he had spent time with the injured in Taupo yesterday, and would do the same today in Rotorua.
"I and the rest of the MoaTrek team will continue today to provide assistance first hand in terms of recovery and support including accommodation and transport."