Someone who lives on the coast could own a boat and simply sail away to a foreign land if an EMP disaster strikes.
One of the hardest parts could be getting to the boat before thieves hijacked it. If you were lucky, you would have a brief period of opportunity before thieves realized (along with everyone else) the severity of the crisis, but I think that period could be short – perhaps a few hours. Security people at a marina would likely desert their post if they realized the seriousness of the disaster, and they are not equipped to do much more than call the police in any case. I suppose one thing you could do is lock the wheel or disable the motor when you are not aboard (e.g., remove and hide some electrical cabling). You could also put up an “Out of service for repairs” sign so a thief would steal a different boat.
The safest thing would be to live on the boat, or to have it docked right outside or near your house. If some of the crew was there and some wasn’t, it might be necessary to leave the dock and let the remainder of the crew row out to you, or even swim out. For crew members living far away, you might have a pickup point and time prearranged, perhaps at night somewhere far from any marina.
Another danger of sailing off in your own boat is piracy. You would want your boat to be well armed (and armored in places?). It would be impossible to outrun a fast pirate motorboat , even with a motor yacht, most of which have a range of only a few hundred miles and so could not get you to Europe or S. America anyway. In desperate times you would have to keep a watch day and night, and never take the boat out with fewer than two crew members aboard (one to steer and one to repel boarders).
Your destination would be an area not directly affected by the EMP, ideally one that is both civilized and does not import much of its food from the US. You could bring gold with you in your boat, and it might be good to have gold stashed in a bank at your destination as well. South America and Europe are possibilities.
This is only a solution for small numbers of people, since only super yachts are designed for more than eight on board.