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?
, many users in the Steam Deck community recommend using from the Discover store. It handles multi-part RARs more reliably than the default file manager.
If you try to extract and get an error saying "Volume is missing," it means you’re likely missing part1 or part3 . Why "Campsite Pack"?