Your drip irrigation barrel......do you run a soaker hose from it and just turn on when you need crops watered?
I have 1/4 inch drip irrigation lines running through the beds, attached to one of 2 rain barrels. I fill them with the hose (metal roof, no gutters, too much pollen to use rainwater.) Got the "starter set" from the Drip Store on line. It works really well. Water goes just where you want/need it.