Decisions, Decisions. And an Aha!
While typing the above, I thought of doing it in the MeshCache. It makes decent sense--the Cache creates, stores and fills requests for mesh data. It will require some small interface redesign, but it's doable. Why didn't I think of this before? I wish I'd come to this realization before 1am. My coding life is filled with eureka moments immediately after powering down the pc or as I'm turning out the light. Or even moments before I would have fallen asleep had the epiphany not occurred. And I'm still working on resuming a normal sleep schedule; so while I could stay up and implement it (I'm exhausted by my damnable sleep patterns, but not really feeling tired at the moment), I really should take a sedative and go to bed.
There's (almost) always tomorrow ;)