The honest answer is that it depends a lot on the campground, the season, and whether you have a reservation. If you already have a reserved site, you usually do not need to arrive super early just to “get a good one,” because your spot is already assigned. In that case, the bigger issue is checking in within the campground’s rules and making sure you arrive while the office is open if you need any help getting in. Some parks will hold your site all day, while others have specific check-in windows, so it is worth reading the reservation details carefully.
If you are trying to get a first-come, first-served site, timing matters much more. At popular campgrounds, especially on Fridays, holiday weekends, or during school breaks, people may line up before noon and some arrive even earlier. For a decent chance at a better site, many experienced RVers try to be there by late morning or early afternoon the day before the campground fills up. In very busy areas, arriving after 2 p.m. can mean most of the nicest sites are already taken. If you are aiming for a site with more shade, a better view, extra privacy, or easier backing access, showing up early can make a big difference.
A practical rule is to arrive earlier than the crowd, not just before closing time. If check-out is around 11 a.m. and you arrive around noon to 1 p.m., you may catch people leaving and have a better selection. That said, you should never assume a site is open until the campground staff confirms it. Some campers extend their stay, and some parks hold sites for late arrivals. It helps to call ahead and ask what their busiest arrival times are and whether they have any pattern for sites opening up.
Another thing to think about is your rig size and your priorities. A “good campsite” for a small trailer may not be the same as a good site for a 40-foot motorhome. If you need a pull-through, level pad, or easy tree clearance, you may want to arrive even earlier so you can be picky. If you only care about a quiet spot and do not mind walking farther to the bathhouse, you may have more flexibility.
The best advice is to treat the first day like a race only when the campground is known to fill quickly. On ordinary weekdays or at less crowded parks, arriving mid-afternoon is often fine. On peak weekends, though, earlier is better, and for first-come sites, very early can be the difference between getting in and getting turned away. If you want, I can also give you a simple arrival-time guide for reserved campgrounds, first-come campgrounds, and holiday weekends.
