Help for burial of mother with 3 toddlers

My son and 3 grandsons lost their mother last night in a head on collision up north leaving work. My son received the call this morning. We need to transport her body back down to Texas and make service arrangements. I am trying my best to help but more is needed. I would not ask if it were not for my grandsons. She leaves behind my son, a 4 year old, a 3 year old and a 6 month old. Service date unknown until we are able to get her brought back down here to Texas from Idaho.