How I'm preparing to fly through the busiest airspace in the U.S: Atlanta

In mid-March, I plan to transition through the Atlanta class Bravo and land at PDK (Peachtree Dekalb Airport). The Atlanta bravo is a monstrous airsapce, and surrounds likley the busiest airport in the U.S. Below the bravo also sit some very busy class D airspaces such as PDK, Dobbins AFB, RYY, and FTY, all within a couple miles of each other.

I plan to file IFR from my home airport to PDK, stop for a an hour, and then make the trip back home. Although I fly out of a class Bravo myself, Atlanta airspace seems like a different realm. Here is what I am doing to prepare:

Examining the approach charts, arrivals, and departure procedures for flying out of PDK. This is the first time I have seen arrivals and departures avaliable to piston aircraft, at speeds and altitudes which are sustainable.

They offer an ILS 21L, RNAV 21L, RNAV A, and RNP appraoches for 03R and 21L. I will not be able to shoot the RNP appraoches for 03R, so I am hoping that it is a nice clear day when I arrive into PDK so that I am able to be cleared for the visual approach instead of having to circle to land.

Flying single pilot in and out of there will be exciting, as its not something I get to do often. But staying ahead of the plane and proper preparation will make this trip a sucess!

Looking at hot spots on the field at PDK. There are 3 notable ones, many about runway confusion.

Reading publications about PDK: best practices for obtaining clearances when its busy, runway incursions, allignment with the correct runway, and hazards of overshooting final while paralell runways in use. These are avaliable on the airport tab in ForeFlight.

If I fly in, I have to fly out. Where am I going to do my runup? https://www.faa.gov/pdk

Knowing my taxiways, what runway I am likley to land, and what FBO I am going to before I get there.