I always make a point, the week or two before, of buying all my incidentals (cokes, candy bars, McDonald’s filet-o-fish) with twenty’s & stacking up the small change for the show.
I also do this for shows I’m just buying at, ‘ cause of venders who don’t.
Also like to bring some long cable & padlocks for the valuables overnight.
Second on marking prices on everything! I like painters tape for this cause it doesn’t stick so aggressively to the poor guys new items.