I’m not sure what document you need for a tour, but for my independent travel I use one of these for paper copies: JPSOR 16pcs 8 Size Mesh Zipper Pouch for Organization, Waterproof Zipper Pouches Colored PVC Travel Zipper Bags Clear Multipurpose Document Bags for School Office Home Cosmetics Storage Toys Puzzle https://a.co/d/c84rZ8M
I have my confirmations for airfare, car rental, hotels, prepaid Vaporetto tickets, prepaid parking, prepaid tickets, copies of passports, etc. I put them in order of use with a little post it note tab on the side that says “air, “car”, etc.
I also keep screenshots of all of these items in my phone in a separate album. This is backed up to the cloud and saved as a shared album with my travel companions.
I will keep one of these plastic envelopes in my day bag for paper items I accumulate (receipts, maps, etc). I’ll keep a little post it notepad and a pen in here, too. I’ve found these various envelopes so useful. I use a small one for a little emergency first air kit for my day bag. Another will hold my items I want access to on the plane (earbuds, chapstick, eye mask, etc) and I can just slide the envelope into the seat pocket. No need to rummage through my carryon item in flight.