arjaydavis,
My previous message must have posted instants before yours.
You can make as many selections as you wish, fill the selections,
save them as multiple layers in a .pdn file.
Whenever you want to recreate the selections, import the template .pdn file.
Layers > Import from file...
Use the Magic Wand to re-create the selections.
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If none of the selections overlap,
the template objects can all be kept on one layer.