Calling us in means accounting for the drive from Dover - we'll give you a real window once we know what's broken, not a vague promise. The more detail you give us up front (make of opener if you know it, whether the door is one panel or sectional, whether it's stuck open or stuck shut), the better we can load the truck correctly for the trip out.
If the door is stuck open overnight, that's a security issue worth addressing before morning. If it's stuck shut and you can still get a car out another way, it can usually wait for a scheduled slot rather than an emergency rate.
See our coverage area for Milford for what else we handle out this way, or check the main emergency repair page for Dover if you're closer to town.