Please look for and post on existing COVID-19 threads before posting a new one.
I know this original post is months old, but, I just happened to see it. My personal feeling is to pre pay, this way I don't have to worry about it later. When I book my cruise I get a total dollar amount and just roll with it. Also, Carnival charges $12.95 (more in suites) per day for these hard working individuals. You are getting top notch food and accommodations. There should be no reason that you should have to adjust the tip amount. Weigh it all out, its not a lot of money to tip for the service these workers provide to you and your family. I don't mean to sound rude, but, show some appreciation for those who take care of you all week on your vacation.