Interesting, we just got Avery, our 10th villager today. I restart my Southern Hemisphere island often, I really like the first couple days on a new island. The last 3 islands we Timed Travelled to the first week of January to start, it is a great time for a Southern Hemisphere island, great fishing and lots of bugs.
ACNH is the only game we play, so setting the clock to January does not create any problems. We may time travel within the same day to meet our schedule but do not do any serious time travel until we get the beautify ordinance. We found that most times our Southern Hemisphere island will get shooting stars in early January, so at night I may use a cheap, less than $10 HDMI video capture card and record several hours of the night sky to watch later and get the weather seed as soon as posssible after an island restart. Tomorrow the Beautify Ordinance goes in effect and we will work on the fish and bugs first to fill the museum. We don’t always finish the museum, some times it may need 1 or two fossils or a statue we can not get.
Weather Seeds show the exact times for shooting stars, as well as rain, and other weather conditions. We use it mostly for shooting stars, likewise if we know there will be shooting stars we can look for Celeste to get star related diys. Celeste is not there every time there are shooting stars. Knowing when it will be raining helps with getting bugs and the rain fish.
At one time we only used time travel for short periods, now we leave the Switch stay there for weeks at a time. We keep the same day of the week, and time of day, just a different starting date.