If you are hosting a group, you can upload name lists and itineraries to avoid registering each individual visitor.
Accepted file formats include: .doc, .docx., ,odt, .pdf, .xlsx, .xlsm, .xltx, .xltm, .rtf, .tex, .txt, .wks, .wps, .wpd, .jpg, .jpeg, .png, .gif, .tiff, .eps