An emotional Western Australian premier has promised to reimburse more than $2,000 in accommodation costs after coming under fire for bringing his family on official regional trips, saying "hurtful" and "vile" attacks by the opposition must stop.

An emotional Western Australian premier has promised to reimburse more than $2,000 in accommodation costs after coming under fire for bringing his family on official regional trips, saying "hurtful" and "vile" attacks by the opposition must stop.