All you have to do is hail them and tell them you're coming.
We've had to do that a couple of times when we had similar
problems. The harbor master never had a problem with it.

"John Cairns" wrote in message
news
Great sail today, went out for about 4 hours. Unfortunately, my batteries
were completely dead when I went to motor back into the marina.
Fortunately,
the wind was blowing out of the E-NE, the entrance to the marina runs
east/west, was able to sail up the channel, drop the main several boat
lengths before the turn into my row, coast right into the slip. Not quite
the same as sailing right in, but I was getting quite a few stares as I
sailed up the channel. Under the circumstances, it seemed like a good
idea.
Waiting for a tow in might have taken several hours, the wind was blowing
in
the right direction. I didn't have much time to gloat, one of my sailing
neighbors was quick to point out that marina rules prohibit sailing in the
marina. Good practice, though.
John Cairns