Like the Fram filter ad states- "You can pay me now or you can pay later."
With a trust you get to choose the attorney (our cost 10 years ago was $2K) or let the courts pick an attorney when a will goes through probate. When you set up a trust you know what it is going to cost, you set the terms you want, you can maximize what is past to your beneficiaries, distribution is quick, no one can challenge your direction, it does not go on public display. When the court assigns an attorney there is no concern about racking up high expenses. Any number of people can challenge a will delaying distribution, running up legal fees, having proceeds end up in the hands of those other than who you intended, and non-tax efficient.
If you have little in assets and do not intend on acquiring much, go with a will. Otherwise a trust is hard to beat.
You can suggest an attorney for your heirs or they can select their own. It is fairly unusual for the court to appoint an attorney unless there is no will. Depending on the state you may not even need an attorney. Chances are if there are unhappy family members they will find a way to make trouble trust or not.