What do I do with Family Trust (I'm trustee) now both parents are dead?

A family trust names me trustee when both our parents are dead, which is now the case. I'm also the will's executor. The estate is in Calif., I am in Nev. What do I do to start administering disposition of estate? Do I file something somewhere? The trust was supposed to let us avoid probate. Was the trust document filed with the court when it was established (2004), and can I get a copy from the court? For a variety of reasons, I don't trust (pun intended) the attorney who did the trust, and her office wants $600 for a copy. For whatever I need to do, do I need copies of the death certificates? It's all (estate, deaths) in the same county--San Mateo. The situation is complicated by an elder-abusing sister (also one of beneficiaries) who's been concealing the deaths from the other beneficiaries to go on living in & off the estate (the house is the estate's main and virtually sole asset). Please advise--thanks!