I do that too, paying particular attention to bringing the right speaker cords. I went off and left one I custom made to hook up banana plugs from the amp output to the speakon inputs of my cab...twice. Had to run back and get it once as I recalled I'd left it while driving to the gig. Got there after the outdoor stage was all set-up (5pc. group) with no room left for me and had to set-up my amp on the asphalt behind and about a foot below than the stage. Here's the shot of it:
View attachment 4784274
Worked out OK though, I usually run my Eden WT500/800 amp bridged at 800-watts rms into my 8Ω DNS-410 cabinet for outdoor gigs. Outdoors I'll run the master somewhere between 9:30 and 10 o'clock. Since it was behind the stage and down a little bit, I ran it to 10:30 to compensate. After the first song, was told to turn it down. So I turned it down to 10 o'clock for the next song. After the second son, I got told to turn it down again. Then I turned it to 9:30 and that was perfect for the next 4-hrs.
I really hated setting up behind the stage and I'm really glad that I have good enough gear that it didn't matter. But anytime I take my 410 anywhere I am very careful to make sure that cord is in my gig bag.
The second time was a morning stage set-up and sound check for a music festival. Got there and got set up but no amp to cab speaker cord. Told the sound company it would take me about 1½-hours to go get it and they said, "no need". In about 6-minutes time they made the cord I needed with banana connectors on one end for my 1999 Eden amp and speakon on the other for my 2015 DNS-410...was a gooooood sound company!