Took a look at Riverdale wave; was surprised to see someone surfing the second wave, in a longer boat. Noticed that they flipped, missed a roll, took awhile to set up; no worries, seems plenty deep behind that second wave @670. So this is probably the best intermediate front surf in the Ogden area (Croyden-like); since OPP first hole is trashy, second wave is decent, fun, but not really a front surf, more like side/front surf, and the 3rd hole is way trashy.
Crystals new wave on the Ogden is another nice change of scenery from OPP; your parked car feels safe for a change (park at Walmart off Wall, after 5 PM since they are still working on it). The wave is tiny right now, but front surfable, some nice stern squirts to be had; with views of Mt Ogden/Mt Allen from your boat.

Crystals wave would be a great place for beginners to get on the river and try some eddy turns; its way less intimidating than OPP right now. In particular, the gnarly 3rd drop at OPP is not ideal for beginners, in a boat, or swimming; and swimming through the shallow 2nd drop is not an ideal beginner experience either.