I have unions on all of my lines and I put the blower nozzle into the exposed pipes. I wrapped a couple of turns of duck tape around the nozzle where it meets the inside of the pipe, which seals the joint and helps hold it in place so I can work the return plugs while it's blowing.
I use a gizzmo

in my skimmer to help absorb ice pressure, but you can use a plug there. I'd assume the skimmer would be plugged with a standard PVC pipe plug instead of a winterizing plug like this

which is the standard type used for returns with Hayward type fittings.
You can leave the pump and filter outside if you like or bring them in. If your pump is hard wired or your plumbing doesn't have unions, it may be hard to move them. You could just cover them in place. You'll have plugs to remove from the pump and filter to drain the water from them.