I did that twice last year.
I recently made myself an "autofill" using a float valve for a side entry toilet cistern some adaptors and quick release hose fitting. Mine is mounted under the skimmer lid (probably not the best place to put it, but it looks neat). Much cheaper than buying them premade and it doesn't take any skill, just connect a pipe and set the float level.
I don't leave the hose on it all the time, I usually put the hose in front of the return to circulate it, but when I need to I can leave the hose on my autofill while I do other stuff and not worry about overfilling.
I'll post some pictures when I get home if anyones interested.