When I go to the outdoor range, I always overpack. First off is eye and ear protection. Besides rifles and pistols in soft and hard cases, I take an ammo can with extra ammo, water jug (we don't have potable water on site), gunsmithing tools, toilet paper, stool, spotting scope, insect repellent, sun screen, my own target frame and targets, hammer and stakes to secure target frame to ground, staple gun with extra staples. I've probably forgotten something! I use handy totes to carry some stuff, ammo cans for other and MTM cases for other things. I always overpack, because when I need something, I want to have it there. Luckily I have a full size pickup.