Chillout VR's new hub page is up. It runs faster than the other one did, and you wanna click Access Key Manager to get the password specific for the SDK.
So far it's almost identical in systems to VRCSDK2.0 so if you remember how 2.0 avatars work you'll be fine. The next field trip is on Monday and that gives you almost a week to port avatars with a bare minimum of effort.