I do alot of work down in Long Point Ryan, and usually the sand points only seem to plug up because of lack of flow. This is usually because most cottages down there are seasonal. There are easy options to rectify this problem though, by simply treating the point and there are numerous ways to do this. If you stay there year round though, I would take a shot with the point. With continuous, I usually don't see too many problems. You will still run into iron problems though, I don't think I have ever seen a water supply in Long Point with less than 4 ppm of iron. That being said though, we have access to a nice new backwashable filter made by R-Can that we have had amazing success with in your area. If you want any more info from me, feel free to send me a PM.
Shawn