Don't expect them to be up early, whatever that means, just contact them and ask. I find it hard to believe you are going to get too many answers.
Plus, if you do set this up and the sp goes out of her way to accomodate an early morning date, you had best be sure you do not cancel, arrive late, or no show. This is a 10000% commitment (if she is going out of her way, that is). If she is normally available anyway, no problem, but isn't it better to either arrange something with someone you've seen before and/or check the ads? Posting this is always a puzzler to me, since it depends on every sp around to see it and reply, unlikely if you wait so late to ask.