For Ste's visit event, you just need to enter your hut around 10.00 - 16.00. It's RNG event that can encounter once a week (except every Sunday). For a trick, if you enter to your hut and the event don't trigger, you can re-enter yout hut again until the event is trigger. (It's work for me too, The power of RNG lol)
For Logan, there still has some events to gain his like and heart like Logan's night visit and fair event (include firework event with him too)