Start with placement
Find the route before choosing the structure.
Begin with the parts of your pond or lake that already give crappie a reason to travel. Look for a protected shallow flat, the outside edge of vegetation, the first drop into deeper water, a point, a dock corner, or a creek-channel swing. A new habitat cluster is more useful when it strengthens one of those natural routes than when it is placed in featureless water simply because the depth number looked right.
Check the depth at the water level you normally expect, not only on installation day. A drawdown, a wet spring, or a managed lake level can change how reachable a structure is and how much of it remains in productive water. Keep the site clear of swimming areas, boat paths, ramps, intakes, and any other place where submerged cover could become a problem.
Then sketch a simple sequence. A small shallow cluster may lead to a vertical stake bed on the first break, followed by a taller mid-depth structure farther out. You do not need to fill every depth at once. A focused first group lets you see how crappie use the spot, then add the next piece where it actually improves the pattern.