My take is that no trespassing signs are not usually displayed around a house and yard, but rather for undeveloped or Ag acreage. Maybe off to the side. As others have noted a fence with a locked gate is the solution. Honestly I think no trespassing signs are rather ugly to display out in front of your house, but maybe that’s just me. As to signage I might go for a “Private - No Peddlers” or some such if I was really cared. 6 AM I’ve already finished my oatmeal and am on my third cup of coffee, so it would be a really early visit to interrupt our breakfast.
As a kid at our farm we had cellar door just below our kitchen window and kids would always climb on it and stick their head in the window, curious as to what we were doing or when we were coming out to play. Eventually we had to tactfully set some rules to allow for privacy (some of those kids are good friends, 55 years later). Supposedly my mom’s pony used to do the same thing and stick it’s head in the window for treats. No local kids back then as the nearest neighbors were a mile away, not across the road, and in any event they had 8 foot wire fence and gate (almost all gone now) to keep the animals off the road.
A fence and gate with an electric lock and a ring camera would be the way I would go