MIDNJAC --- for VFR arrival procedures you're just referring to KATL, right? My plan was to just stay under the Class B, hit a VFR reporting point and call the tower, no fancy stuff (hopefully).
Yes, many extremely high traffic volume airports publish specific VFR arrival procedures. You can do it not knowing them, but don't count on much assistance from ATC aside from a vector and a long wait if you can't comply. As a newbie civvie pilot I had a similar surprise entering SEATAC's airspace, trying to get into BFI and not knowing the Vashon 1 arrival.....lesson definitely learned after a couple terse responses from the controller and heading off towards the San Juans and beyond

If you go, be concise with your radio work and don't give them any extra info that they don't need....that will make your experience go more smoothly. It seems like a lot of pilots build Class B up to be something it isn't, but that said, it still can get very busy and confusing if you don't know what to expect and lose SA. Happy flying!
Another consideration is being
extremely vigilant with your traffic scan. On a recent trip in an orange and white airplane through Houston's airspace, we had 3 different relatively close calls (had we not been keeping our scan up at least) with no prior heads-up from ATC. In that busy sort of an environment, they really can't provide that nice traffic advisory service that we tend to depend on so much (bad habit as it is).