I started container gardening several years ago, but with only a few veggies at that time. Every year I've added more veggie containers (as well as containers in general). This year ALL of my veggies were in containers, and NONE in the ground....with two exceptions...the rhubarb is still growing in the ground (and will continue that way), and I grew the zucchini on top of one of my biggest compost pile. Most everything did very well....mostly!
I had a bumper crop of peppers of several varieties...bells, bananas, jalapeños, and ornamentals! The cherry and grape tomatoes produced waaaay more than I could use, or even give away! I also had 8 varieties of 'regular' tomatoes...some hybrids, some heirlooms....and they did fairly good considering the cool, wet summer we had this year. And because of the growing conditions, I had a few problems with blossom-end rot, but not too severe...and I found a calcium solution to spray on them weekly, that helped out a great deal! And zucchini....geez, did we have zucchini!!! And more zucchini!!! We had it for supper again tonight!!!
I also had radishes (which did very good), mesclun, spinach, collards, okra, onions, garlic, broccoli, and swiss chard (although it didn't fair to well). I also had (and it's still growing too!) parsley, basil, lemon balm, and mint.
I still have 1 banana pepper plant growing and producing, that I move out of the garage during the day, and put back in at night. And those pepers are doing fine!!! Had one in my salad for supper tonight!!!
Some of the containers are fancy-schmancy self-watering ones, some are just plain old containers, some are wooden tubs, some are big plastic/rubber "muck" tubs, some are plain ol' 5-gallon buckets, and some are hanging pots/baskets of some type or another. Most things get a nice 1.5" to 2" layer of cypress mulch to help with moisture control.
I use a garden hose for stuff near the house, and have a couple of 'home-made' 60-gallon rain-barrels in the 'outback'. I got them from the local extension office for a donation...they're recycled food-grade plastic barrels, with the necessary fittings. I'll probably grab a few more next Spring! All it takes to fill the 2 of them, is 1/4" of rain hitting the garage/workshop roof!!!
BTW, counting ALL of my containers....veggies, herbs, foliage, and flowers....I had a total of 116 containers planted up this year!!! PLUS, all of my flower gardens!!!