I have a summer cottage where, each year, I need to unhook a few pex connections to drain the system so that it doesn't freeze.

I'm re-working the system this spring, and want to design it so that it's less painful to unhook in the fall and reconnect in the spring. The frequent disconnecting/reconnecting is also hard on the connections, so I want to make it easy and durable.

I am thinking along the lines of the ease at which air compressor hose / air tools can be disconnected/reconnected via the NPT quick couplers.

I was investigating sharkbite connections, and it seems they're removable (with the removal/disconnect tool).

My question is - is that a durable way to disconnect/reconnect many times as I've described?

Is there an alternative that is better suited to this need?

Update - there's a pressure tank, water softener, water heater, and jet pump. There's NO way that it will completely drain even with a tap at the lowest point. Think about the water in the softener resin tank, etc. I have no confidence that the water will drain enough and out of all parts so that it won't damage when frozen solid. ... or am I worrying too much?