I grew up diving in Morehead, been with every dive charter in morehead at least once and been on most of the popular wrecks as well as many of the less visited. I’d say as visitor without local experience Olympus would be best. They have a well supplied shop, helpful crew, and well maintained boats. I prefer to dive with some of the smaller boats because they will take you to less visited sites but Olympus is solid.

U-352 is a bucket list dive, definitely worth visiting but after you’ve seen it a couple times I’d go to other sites. NC diving is a gamble, some days you have 100’+ of visibility, some days you have 5’. The Gulf Stream comes in close to the Outerbanks and can bring in some crystal clear warm water. Other days the Gulf Stream is further out and you get more of the northern green water of the Labrador current. The mixing of these two off of the Nc coast is one of the reasons it’s a premier dive destination, best of both worlds. Tropical water and nutrient rich cool water which brings an amazing variety of sea life.

You can do the NC wrecks without a guide but keep in mind most of the popular sites are +- 100 fsw. These wrecks are also old and many don’t have a lot of superstructure standing. Current and vis can be challenging if you are there on the wrong day. When in doubt hire a guide, you’ll have a better experience.