Isn't the trust controlled by the trustee? While a beneficiary has no say in how the trust is run, unless they are also the trustee (that's possible under Australian trust law - not sure if the same is the case in the USA), there's nothing to stop a beneficiary making specific requests to the trustee. The trustee could very well decide to humour the beneficiary, if the request is reasonable.
If you have any more insight into this matter, I'd be very interested to know, Jeff!