#reset trick

Finally, you could try your hand at villager/campsite resetting. Here are a few guides which explain it: here, here, and here!

Here is a great video of the plot reset trick in action! 

Unfortunately, it doesn't work. I’ve personally tried this before with no success. What you see on the title screen isn’t indicative of what you find in-game if you haven't already loaded your mayor for that day. If you load your mayor, there’s a very high chance the plot will move. 

There’s no need to worry! The camper reset trick (or any reset trick, for that matter) will not result in any damage to your game. It’s perfectly safe to try! The only potential issue that could arise from the reset trick would be if you accidentally loaded your mayor before you were ready, but that would not cause irreversible damage to your game. At worst, you might end up with a villager you don't like or a plot in a bad spot, but these can all be rectified.

**Note: if you wish to plot reset Marshal in today's time, you'd need to change your 3DS clock. Changing the game's internal clock requires you to pick your character and change it with Isabelle, and I'm not sure if it's possible to change it without loading your character afterwards. Given that you're trying to sync your times up, it might just be easier for you to plot reset Marshal in the past. 

Try this answer, which provides a walkthrough of the process as well as a couple of helpful links for more explanation.

The reset trick doesn’t really work to make villagers ping you. However, you can try the diving trick for pings! If you're seeking PWP requests, try filling your pockets with tools/money/shells/flowers to eliminate any buy/sell/trade offers!If you know that a certain villager is moving and they won’t ping you, you can also save and quit the game and then start it up again. That sort of ‘refreshes’ your villagers and gives you the chance to walk past your mover until they ping.

Unfortunately I don’t believe that’s true. If you start up a new character when you have eight, nine or ten villagers, not all of them will come outside at the start of the game. It will generally be an even split between villagers who appear outside and those who stay indoors. A villager in boxes will remain indoors.