If you already dayhike by yourself and return to a campground at night, you shouldn't have much problem going on solo overnighters: all you're doing is postponing the hike back to the campground (now known as "the trailhead") until the next morning.

The gear may be a bit different, since you have to carry it. (No 10 pound tents or 5 pound sleeping bags need apply for the job!) Why don't you tell us what you have already, and we can go from there?

The only other consideration is food - you won't be lugging a cooler, so grilled steaks, fresh veggies, and cold libations probably won't be on the menu. Again, tell us how you eat now when you hike and camp, and we'll go from there.

Welcome aboard!