I've not thought about nor worried about wear and tear. I did a search but didn't find anything. Are you just being cautious? Or perhaps you only access files occasionally?
Either way, you may want to creat a bash alias in your .bashrc file so that you can type a simple command like mountnas or 'nas' and you might have another to run the umount command to unmount it.
Since my NAS runs my camera recordings and backups and some containers, I figure wear from mounting conveniently shouldn't be an issue...