Argh, it's been years since I tried MaximDL... I have tried BYEOS and I don't think it does that. I know that when I use qDSLRDashboard it'll do that though with some settings.
We could make it a feature request. I think when you start pushing 15-30 minute exposures you just accept you're going to lose some of them to weather. The big thing is you're not going to have an appropriate dark frame for that time any ways right?