I've always used Charles' technique.
-holesaw out enough drywall blanks to do all the holes (you didn't mention the size, Tom; 2" ?)
-rip some 1/2 or 5/8" scrap plywood strips...make them maybe long enough to extend past the perimeter of the hole by at least 1" on either side
-put a temporary drywall screw into the center of the strips length...this is to hold onto while you install the strip into the hole. Remove the screw after you've run drywall screws through the wall into your sticks.
It's now permanent and no buildup ox glue between the back of the wall and the face of the stick! THIS IS IMPORTANT! If you have buildup, the attachment stick sits too far back and the patch~plug won't lie flush with the wall.
That's not a huge problem if it isn't, just more work in filling.
-screw your plugs into place...one screw centered is all you need.
-fill the perimeter fully
...I highly recommend using Taping mix rather than All Purpose, but you're not going to go and buy a bag of that for a dozen holes(?).
-Let the mud dry completely...it's going to shrink!
-now fill the surface as you would for any taped joint. It really should be taped but doing small circles is a royal pain. If the plugs are 2" 2 strips of that fibreglass patching tape should cover it nicely, and you can do all the holes before mudding. Don't overlap the tape strips...just butt the long edges otherwise you'll be really unhappy with the mud buildup required to bury the tape completely. https://www.homedepot.ca/en/home/p.f...000115533.html