Still some hazy bits, but
July 29-31 HSC conference, San Francisco
It starts on the 28th, but I'm going just Friday noonish to Sunday noonish, for two talks, and one panel.
Probably one afternoon around August 27 (give or take), small gathering, NOT big, NOT general, but just unschoolers, in Farsley, West Yorkshire. Too soon to know for sure.
Possibly one afternoon somewhere around Brighton, at the beginning of September (not known, but being considered).
September 18, Sunday afternoon, definitely, Long Ditton, Surrey (not for beginners)
September 29-October 2 Free to Be Unschooling Conference, Phoenix