Anyone know of a way to completely disable the Windows 11 taskbar? I've enabled the option to show a DF taskbar on both of my monitors. Right now I have the Windows 11 taskbar set to auto-hide, but it pops up whenever I mouse over the DF taskbar.

Yes, hovering over the DF taskbar also activates the auto-hidden Windows 11 taskbar.
I did find a way to effectively disable the Windows 11 taskbar using NirCmd so now I have only the DF taskbars.

I use nircmd (https://www.nirsoft.net/utils/nircmd.html) to make the taskbar transparent. I have two functions per taskbar, transparent and opaque:

Replace with for taskbar on second monitor. I run these functions with triggers to make them transparent on DF start and opaque on DF end. I also trigger them whenever an explorer.exe process starts because in some cases Windows would just reset the transparency. Make sure to keep the Windows taskbar on auto-hide; otherwise it's still on the bottom, albeit transparent. I also have DFs taskbar on the top of the screen.

Ah yes I discovered nircmd the other day and now have it permanently hide the Windows 11 taskbar whenever I log in. I'm using the DF taskbar exclusively now on both of my monitors.

I have a folder in the root of my drive now called "nircmd". Inside that is nircmd.exe and a batch file with:

"C:\nircmd\nircmd.exe" win trans class Shell_TrayWnd 256

I've created a task in Task Scheduler to automatically run the batch file whenever I log in to Windows.

Late to the party here, but I was able to "disappear" the Win11 taskbar using nircmd, but when I placed the DF taskbar on the main monitor where the Win11 taskbar was now transparent, the DF taskbar was not in the same space as the Win11n taskbar - it was situated above it, leaving a gap. Is there a way to have it completely "replace" the Win11 taskbar - i.e. sit in the same screen space as the one that is made invisible?