The problem is Carol will be completely backburned in 7a... tracking tells us she will only appear twice episode 3 and 8 . she wasn't filming for episode 9.. so it would make sense that Carol still be be in a fragile state. Especially with there being no big time jump.
I also see Daryl not telling Carol as him protecting her. If he told her she would return to ASZ and walk right into danger with the saviors hanging around. Which wouldn't be good for Carol in her emotional state....And you know Daryl could be leaving to get supplies or something. We don't know anything about this part of the spoiler..... Also I can't see Daryl returning to ASZ yet, Negan will be looking for his ass after he escaped from Sanctuary.
I do think that Daryl not telling Carol is opening for SG to have Carol find out in a dramatic way...