For a small plot, I've found that making a hedgerow of Sunflowers works very well to keep Deer out of my garden and sweet corn patch. I plant 10-12 rows of Sunflowers within a 36" width, around the perimeter of the garden. I mix the tall striped, and black oilers together, to make a nice tall, thick hedge fence. My garden is about 1/4 acre, and 2, 5 lb. bags of Sunflower seeds was enough to make the fence for 2 years.
The theory is, Deer will not jump over anything, they cannot see the other side of. Granted, until the Sunflowers get tall enough, so they cannot see through/over them, they will walk through them. Once they do get to that height, they will not. They may browse on some of the Sunflowers on the outside rows, but, that's about it.
This past summer was the first time I had a garden without the protective hedge fence. Big mistake. The Deer riddled the garden. Barely got enough tomatoes, to put up. It's the first time I've ever seen a Deer actually eat the tomato. I'm assuming it was a particular doe, got a fancy for the taste of the Mortgage Lifter tomatoes I'd put out. Out of the 2 dozen plants of them I'd set out, I only got 2-3 edible tomatoes, she ate the rest, whenever they were near ripe. And apparently the 6 dozen Celebrity, and the 4 dozen Opalka tomatoes just didn't quite suit her taste. However, she did pull them off the vine, and dropped them on the ground. So, next year, I'll definitely be planting my hedge fence, once again.
Lack of moisture there will probably make this suggestion useless to you. But in a good year, it'd be worth a shot. I'd suggest tilling around the perimeter, then for a large area, you could use a small broadcast spreader to sow the seeds, then lightly disk in. It doesn't take much to get them going. There is also the plus of attracting bee's for pollination.
I make 2-3 entry places, like a small maze type entrance, so they will not come in, but yet, I can cultivate, and harvest. That would be the tough part for you, although you could make a high fence gate to get in an out.