Tidewater was at one time one of the most highly rated courses in the entire Myrtle Beach area; it has sort of fallen off the radar in recent years, but it's still a very good golf course. Before all the housing was added, and there's a lot of it, it was truly a beautiful course. Less so now, of course, but that's ok. But I consider Tidewater to always be worth playing.
I think perhaps if you played Glen Dornoch another time or two, you might revise your opinion of it just slightly. Until #16, it is a pretty good golf course, and very straightforward, IMO. But the last three holes are so completely unlike the rest of the course, and VERY difficult, that it sort of colors your view of the entire place, I think. #16, IMO, has completely the wrong green for the length and layout of the hole; it is much too small for the club that you are hitting into the green, and the fall offs around the green, especially on the right side, are very penal even if you can find your ball. #17 is a long, blind par 3 on which you not only don't really know where to hit the ball (except that you CANNOT miss left!), but you can't see how your shot turned out until you get up to the green; the hole is also exposed to the wind, with hazard down the left, so it's just very, very difficult and not much fun. #18 is sort of a mess; it is the ultimate in target golf, but the first time you play it, you don't know what the targets are. It gets marginally easier with more plays, but again, it's exposed to the winds off the marsh and not really a lot of fun to play.
I love Rivers Edge, and have since it opened. The 9th is perplexing because of that green; it is just SO small. I may be misremembering this because it's been so long now, but I think there were fines assessed by the EPA for that green even being built, which may explain why it isn't bigger. But in any case, it sort of ruins the hole; there simply isn't anywhere to miss without losing your golf ball; the hundreds of balls that are visible down in the marsh are evidence of that. (And they've ALWAYS had trouble with their greens, fwiw.)
I haven't played Prestwick or Pawleys, if only because if I'm going to be anywhere near that part of the Strand, I'm going to Caledonia and True Blue, regardless of the cost.