If I'm in enough wind to make a seaway I'll be sailing
Seriously, I've thought that it would be nice to take enough fuel and have an extra long shaft so if I'm offshore and there is a swell without wind, I can motor home. Realistically though I've never had that problem. Generally if there isn''t enough wind to get you back there isn't enough wind to get you there in the first place.
I have turned around because I felt like the wind was dying, and I didn't have a motor if it did. I really wouldn't want to anchor in a busy rolling inlet.
Also it would be nice to have something to get me out of the way of all the huge ship traffic in Charleston, that and something for around the dock is why I'm leaning towards the 4hp. It'll probably be a few weeks before I get something so keep the opinions coming and I'll let you know how it turns out.