Hi Loren,
This has all been discussed on other threads on this reflector at length. A method of using the earlier FT8 was worked out but was not perfect. Your assumption is correct that with the extensions in version 2.00 which was officially relweased yesterday, there is now support for various contest exchanges, which could probably be used for SOTA as well. We do need the community to agree a model for SOTA for WSJT-x v 2.00 FT-8 communications however, otherwise it will get somewhat confusing if the format varies between Ops.
We also need to decide a few points about which mode should be used etc. this is being discussed at present on a different thread. 20m FT8 DX S2S event / attempt ? (which you are already part of I think).
73 Ed.