In the leadership race, if you were to get more than $10,000 in that last week, then you'd have to do one final disclosure. You could do the same thing for candidates. You're talking about $100 donation limits, so if they're not getting significant amounts in, the disclosure wouldn't have to happen. You could even have a threshold for the overall disclosure, so that if you didn't raise a certain amount, you wouldn't even have to do the disclosure at all. You might just disclose the number of donors you have, not the names, etc.
I don't think it's a problem.