I loathe cleaning guns, so I never take more than 3 to shoot at any one time. Plus, it can be a pain to take more than 3 guns with all the accessories and ammo you have to bring. If you saw me going to the range you'd think I was going on an expedition with all the gear I take with me, not including the guns.
There is no formal shooting range in my area, so I have to take a portable shooting bench, sandbags, spotting scope, target stands, and sometimes a chronograph if I'm testing loads. Then there's still the guns, ammo cans full of ammo, and more ammo cans filled with various tools and cleaning gear.
Then there are times when I just don't want to bother with all that, so I'll just take a .22 or two, maybe one pistol, usually a .45, and only one ammo can full of ammo. Just right for a day of relaxing plinking.