The guineas will most likely wander into the woods when free-ranging. They pretty much go where they want, but if they know where home is, they'll come back at late dusk.
A general rule of thumb is to keep guineas (keet or adult) confined in their coop or run for 6 weeks so they'll know that the run/coop is where they're fed and sleep, aka: home.
Some people, like me, took a week and let them out a little at a time - for an hour or so on the first day, a couple of hours or more on the second day, etc., until they were out almost all day. Others open the door and let them go after 6 weeks. Either way can be successful, but I'm a worrier....The first time I let them out for the day, they went straight to the woods and hung out all day. I was wringing my hands all day until they came back in on their own.
Sometimes you have to "herd" them back into the coop if you're ready to be in for the night and they're not. They are also virtually blind at night, so letting them stay out until it's dark means they may find their own roost and stay there for the night. In my area, night predators pose the most threat so I got them in at dusk.
Very often they'd be in the run before I got out there, so they should come back in for you most of the time, but I never took it for granted.
Another thing I noticed about my guineas is they had a roaming routine. They'd make the rounds of their own choosing and, for example, be in my front yard at about 2:30 in the afternoon, then they'd be in the back yard at about 5:30. It's possible yours will develop a routine, too.
A trick to getting them into the area you want them to be, when you want them to be there, is to notice where they are at, say, 6:00 p.m. and be there with treats. You can train them to come to you by using the same phrase EVERY TIME and then giving them their treat. You'll find that they usually come to that spot at that time in anticipation. (Word of Advice: Don't call them to your front porch to give them food treats. You'll have guinea poop EVERYWHERE on your porch.....speaking from experience. LOL.)