Okay - then here's what I THINK:
1) MP and Epi are not Donners.
2) Llama or SVS wrote the message from Mrs. Donner.
3) The lunch was stopped by a tie (can someone give me a tally of the ending votes?) or by Jacob Donner (I don't have a theory for why unless LC is Jacob Donner).
4) Epi somehow predicted that the lunch would be stopped (he is a Reed and they planned a tie vote? or is he a Donner?), either way, I don't think Epi is bad - for now
5) Maybe Epi guessed that SVS wrote the message from Mrs. Donner (or not) either way, SVS seemed to think that he did, so I don't think that SVS is bad either - for now.
6) If SVS wrote the message from Mrs. Donner then Llama might be bad. LC might also be bad, based on my initial gut reaction to his posts (non-info dumping related - based on his lack of analysis and "latching on" on).
7) I suspect that Snowman might be bad but SVS defended him so he might also be a Donner.
That is all.