Or would it also make sense if I playthrough all of Coves steps, then load up a save for baxter and his route and his epilogue, then load another seperate save for step 4 to play dereks one?
Baxter's story can only unlock if you don't load a save that's already in Step 3. You need to play Step 3 from the very start. So either starting a new file or loading a save that's in Step 2 and then going into Step 3.
