We've moved
CampTool for this camp now lives at mathcamp.camptool.org. Your account, and everything in it, came along.
Passkeys belong to the address they were made for, so one made for camptool.mathcamp.us won't work at the new address. If that's how you sign in, use it here one last time: you'll be signed in at the new address and asked to make a new passkey there.
Go to the new address