XPS 17 - Battery drains while sleeping, and Disabling Windows Modern Standby

Researching the reason my battery drains every night when in sleep/hibernate mode, I discovered it's because of Windows Modern Standby.  

My question is:  If I disable this feature by editing the registry key as described here (https://winaero.com/how-to-disable-modern-standby-in-windows-11-and-windows-10/),will that solve the problem?

And if so, would it then be safe to transport the computer in sleep or hibernate mode in my laptop bag?  

It is pretty important I be able to save my open applications, files, and tabs when I leave the office then pick up the work at home later.  Had I known this was a restriction on Dells I would have definitely purchased a different brand.