I wouldn't worry, my procedure is to use a card for whatever, delete all the images, then re-use.
My Nikon has never got hung up or required cards to be re-formatted, I format them very rarely.
Perhaps if you don't delete all images between shooting sessions (e.g. to leave some good ones on there to show people), what you suggest would be better.
I have just had to 'turn my crank' back down - as my wife returned home
Cheers,