@ccliffy

VP does sync, making a small selection of selected events on different tracks gives better results. Then "select "Synchronise Audio to align events".

Then select all of the tracks and select "Create multicam track".

Pluraleyes is better. If its not working in VP18 use this workaround. ...

Pluraleyes ... 
Copy the file "PE4Vegas14.dll" which is in the folder .. C:\Program files\Red Giant\Pluraleyes 4\
then paste it to ... C:\ProgramData\Vegas Pro\Application Extensions\

or ... "PE4VegasLoader14.dll" rather than "PE4Vegas14.dll"

thanks. I am lucky my old version of Pluraleyes is V4

I am disappointed I have to use a 3rd party add on to do something I expect in a pro level program like Vegas Pro. IF Vegas 18 had it I'd upgrade in a heartbeat

Auto-synch in Vegas Pro works either via the source's timecode or (similar as PluralEyes) via an automated analyze of the audio waveform. Both types of auto-synch are available via the Tools/Multicam menu.

I have to assume that 18 still accepts slaved SMPTE timecode with Genlock for the camera sync, regardless of their audio source. I see this as still the best way to sync multicam tracks, with PE or the new function being reserved for those outboard handheld and ambient recording sources that are impractical to include in the hardwired chain. I also assume the new audio sync feature is a WIP.

I was just doing a project and tried using Vegas to sync linear timecode embedded in a video track from a zcam camera slaved to a SoundDevices 788t recorder which uses Ambient LTC. In Vegas, however, the "Synchronize Media Timecode to Align Events" option in the Multicam menu would not light up for me. Same in v16, v17, and v18. Popped the tracks into Resolve and they aligned just fine. So I just noted the position of the video track in Resolve (started the audio recorder 1st so its tracks were at origin) and aligned the video track to that time manually in Vegas.

@Howard-Vigorita

If you check the first few frames of each source, do timecodes match at the very first frame, are they different, or is one missing the first frame timecode altogether? This was a big gotcha for me using pairs of XHA1s, and only "freerun" and "nondrop" eventually worked for me, and some opening frames still needed to be trimmed. These tapes were a bear to work with, But when I got all the gremlins out of the way, it worked like a charm

I am not sure if this applies to my situations - multiple uncoordinated camera sources from concerts with a separate audio source from an audio recorder

Plan on a lengthy editing workflow.

"multiple uncoordinated camera sources from concerts with a separate audio source from an audio recorder"

As mentioned above, even if there is no matched timecode there is a synchronize tool in the Tools/Multicam menu which then will analyze the waveform to synch the Events.

I am not sure if this applies to my situations - multiple uncoordinated camera sources from concerts with a separate audio source from an audio recorder

You can try the Vegas tool, but if it's too slow or unreliable, give PluralEyes a go. It works well in VP 18 and that's my second step in editing projects like yours with multiple cameras and multiple audio tracks (the first is laying out the tracks).

@Howard-Vigorita

If you check the first few frames of each source, do timecodes match at the very first frame, are they different, or is one missing the first frame timecode altogether? This was a big gotcha for me using pairs of XHA1s, and only "freerun" and "nondrop" eventually worked for me, and some opening frames still needed to be trimmed.

@Musicvid Thanks I gotta look at this some more... it worked for me fine in Vegas when I tested it a few weeks ago but I must have done something different in my recent shoot. I only had one camera slaved to my flash recorder and didn't record an audio track in that camera. The other cameras I synced optically off a stage light.