
Open Origin and put it in offline mode before pressing Play.Quit and delete the five cache files in your Sims 3 user folder: CASPartCache, compositorCache, scriptCache, simCompositorCache, and socialCache.Disable memories, the interactive loading screens, the in-game shopping experience, and memories. Exit to the Main Menu and turn all the graphics settings to the minimum.Immediately before you want your sims to travel, use "save as" and rename the save, so your original remains intact as a backup should you need it later.A few items is fine a few hundred is not. Empty your sims' inventories out as much as possible.If you don't want to use mods, the only thing I can suggest is reducing the stress on the game engine as much as possible, which you may need to do even with the above mods in place.

Specifically, install NRaas ERrorTrap, Overwatch, Traveler, and Register you can find more information about them here:


