Outdoor ranges are subject to the weather. I'm assuming you're going to PoCo. Dress warm for winter and less for summer. The noise of gunfire aren't as loud as on an indoor range but that is counteracted by the sheer number of guns going off at the same time, esp at PoCo.
Depending on which outdoor range you go to, some have target backers already mounted at specific distances, usually 50, 75, 100, 200 M or Yds. You just walk out and pin or staple your own targets on them. Other ranges have target backers at the firing line. You can set up your targets when you arrive and when the range is SAFE, walk the backers out to the distance you want to shoot at. You can also uncase and handle your guns when the light is RED, on arrival, and set them up properly pointing downrange with the action open. You can also load your magazines. When the light is GREEN, it means the range is safe and NO HANDLING of firearms is allowed. This is when you go and set up or change your targets. You can load your mags during GREEN at most ranges.
Bear in mind, some ranges will NOT allow you to load magazines when the light is GREEN. Also, regarding targets, some ranges will NOT allow certain types of targets, like human silhouettes or zombies or what not. Check with the range you're going to to make sure your targets are approved.
At quiet ranges, anyone can call a Cease Fire to change targets etc. At busy ones, a Range Officer will usually have a set time ( every 20 mins for example) that he will call a Range Safe. Make sure you open your gun action, make sure the gun is unloaded and take out your magazine during such a command. Do not fuss with or touch yours or anyone elses gun during a Green or Range Safe command. Not even to adjust your scope.
A Range Safe exists until everyone is back to the firing line. The RO will do a scan to make sure and call the range active after that!