Thanks for that information. Very helpful.
I have also learned recently of an IC family that looks like a good option: LMN400 or LMN200 from Diodes incorporated. These devices bundle an n-channel MOSFET (to drive the gate) and PNP to do the heavy lifting.
There are also some other similar load switches that use a p-channel MOSFET in place of the PNP.
Using one of these load switches keeps the polarity of the signal the same as my current config so I wouldn't have to rewrite any code.
Jim