maine activity on the ute bands is so wide and varied that it's hard to know what to recommend. Certainly what mjk put out is a start, but it barely scratches the surface.
To understand what you can hear, you need to understand a bit about HF propagation - to start, you should listen above 10 Mhz or so during the day, but at night, drop below that. In addition we're recovering from a solar storm that really stirred things up - you see, not only does the time of day matter, but the activity from old Sol can really mess things up. Things are going to be a bit messy for a few more days at least.
Here is a very good starting point for understanding this topic - note that you need the Flash player to be active to view it...
Propagation Primer - Flash Movie by AE4RV
Of course the receiver and antenna play a big role too. What are you using?
Looking at logs takes a bit of a discerning eye. The UDXF is a worldwide group, so there's a fair amount of folks from places other than the US. Keep in mind that what they hear in Europe you might not be able to hear here, due to very different daylight/darkness patterns. When you look at logs, watch for those reports from your general neck of the woods. For example, logs from a DXer in NH are much more useful to you than ones from California for exactly the same reason.
While there are some stations that have fixed schedules, many don't. You simply need to know what it is you're looking for, where they have shown up in the past, and at what time. That's only a start - there's much more to it, and it's often learned by looking at logs and tuning the bands. Start to learn the 'feel' of how signals are propagating - after a while, you will recognize the signs of disturbed conditions even before you check websites like Spaceweather or listening to the 18 min past the hour broadcasts of WWV
Mike