Nice, my camp isn't all decimated to shit today and is in fine status. Gotta enjoy the little things!
I'd say give it a shot and keep playing 2-4 more hours, that's about how long it took to snap out of it and start working again for me.
I have the same problem, and it did finally get unstuck after a few hours. Like way after I had delivered the watch, I went to home base for another reason and Lily was like "my dad's watch!" I think it may have been after I started the game again.After doing the memento mission :/
I tried doing what they said on the forum and to simply exit the game and come back but it's not working. Happened to people on gfaqs and the official forums too.
I'd say give it a shot and keep playing 2-4 more hours, that's about how long it took to snap out of it and start working again for me.