Have you finished the quest? sry for the late answer, well it tooks me 2 days to finish the quest lol, because i dont  know where, but after exploring many times finally i found it. have tou saved the lifesaver? in the building with pool then to finish surprise encounter go south west, its basically under that building then u can see the rope to trigger the quest.

who is caroline T_T,  I forgot the real name, because I changed it all lol.

is she aunt of the hero? damn, i have waiting for this on the way then. 

 i have some tips maybe you can consider it, you should add horde (random or certain day) that attack hero house and wreck his garden and water containment, but you can prevent it more or less like a surprise encounter event and also game over if the horde enter  the house,  then the game should be more intense :v 

Because... well, after create garden and water cont (the big one), its basically not survival again hehe.