Instead of parenting them to empties, just create collections. I use Front, Back, Right, and Left. This corrisponds to the view. Then I have LCA last in the list. The order of the collection in the outliner determin the hotkey. First one is 1, second one is 2, and so on. Then it will be any subcollection under the first collection then the next one, and so on. Note: This only hides the collection it still renders. If you are workind with a lot of collection and need set rendering on/off or to go quickly thru the collection in the outliner you can click the filter icon on the header of the outliner and then under collections uncheck Objects. Now you will only see the collections listed in the outliner. Very handy with large scenes.
