You raise a valid point since there's 132 dnd-5e published-adventures questions and the vast majority are about to get a named tag.
There's been a couple of ideas about how to do significant retags in the past:
- Do like, five or ten a day tops. Keep an eye on the front page and don't do another retag session until the last retag session (yours or anyone else's) has already flowed off the front page.
- Do all the editing you can in one session (if there's a limited and reasonable amount to do) so that you limit the front page to being disrupted for just one day. Most users on this day will just check the Newest Questions list instead of the front page to see what questions need attention.
In this case I suggest using method #1. There's 100+ edits to do and we haven't actually made named tags for this category before. It'd be better to take it slow and steady so that errors can be fixed, and potential debate over how to tag these (e.g. whether or not to keep the published-adventures tag on some/all of them) can be done along the way on meta with time to spare.