How do you load an earlier save?

Have you tried resetSim * - it will reset all sims. Just open the cheat console - type in resetSim * - and hit enter. Don't worry if the game pauses for a few seconds - it's normal. 

Also, testingcheatsenabled true might help get rid of the paparazzi. Have you tried that? 

To get an earlier save, you will have had to have used "save as". In that case, you can go to your saves folder and load the file. Let's say a save from a few days ago was named "Sunset Valley" - then this save currently is "Sunset Valley 1" - when you go to the saves folder, your Sunset Valley will be there looking like: Sunset Valley.sims3.backup - simply rename it to: Sunset Valley.sims3 - then you can play that save again.

Welcome to the Answer HQ!

Besides what Andromache said about reseting the sim stuck, I found that the best way to keep paparazzi out, is to put the fence all over your property and put the Electric Gate that came with Night Life expansion pack. The normal gates won't stop paparazzi or other sims from going into your property. The Electric Gate will only allow the sims that live in that house to go in and any sim that you call on the phone for services.

Hey!

I'm not sure if any of those earlier replies helped or not but the simplest thing I can think of to get rid of the unwanted sims in your yard is to type "ctrl-shift-c" then "testingcheatsenabled true". After that you should be able to shift-click on the sims then object>delete them. That's how I keep all of them out of my yard.

Hope this helps!