Basically, I place the full "Master" track below all the other audio.
Keep each camera on a sperate track as well, they can overlap though. The program will match each camera to the master track and move it over matching the master audio timeline.
It wont delete items though, but you get a neatly sorted timeline.
If your having trouble, or long "sorting" times, separate the project into 2 parts...sync and then you can put them all back together on 1 timeline.
Typically, we have 3 cameras plus a crane. I place the master audio below everything and sync each camera to the same master audio individually, then I put everything together at the end.
How about using Multicamera Editing and syncing all 3 cameras into one clip and having 1 master audio? Group them up so they stay in sync. In that way you have only two tracks. It's very convenient. You can at any time split the single multicamera track into its individual components, if you so desire, and back again.