You can't usually extract part2 by itself; the data is "stitched" across all parts. To open it, follow these steps:

Do you have of the pack downloaded, or are you seeing an error message when you try to open it?

Ensure Campsitepack1.part1.rar , Campsitepack1.part2.rar , and any other numbered parts are in the same folder .

To get the contents out of that specific part2 file, you actually have to treat the whole set as one unit. Here’s a quick guide on how to handle it and why it’s structured that way. How to Extract Multi-Part Files