Go back to the trust document and see if there is a provision that says that the trustees may act independently of one another. If so, you could open the account for just one of the trustees. If not, you may be stuck with not only two trustees but a two-signatures required account, which no bank wants to manage.
If you have co-trustees that must act together, see if the trust allows the trustees to to cross-appointments of attorneys-in-fact, so that Trustee A is AIF for Trustee B and vice versa, but only for purposes of the trust. That could allow one trustee to act on behalf of both. Be very careful with this, though, and discuss it with bank counsel to ensure that it's allowed in your state.
John S. Burnett
Fighting for Compliance since 1976
Bankers' Threads User #8