I've never tried the peas in the OP, but one year me and a buddy put in a 20' by 100' patch of three different types. Purple Hull Cow peas, Cream Zippers, and Crowder peas. I had a working tractor at the time, and a big PTO driven tiller. The pea patch was a hard, gumbo clay strip, that had been excavated from a county drainage ditch on my property. It tilled up to a clumpy patch, that wasn't real easy to row up, but we did. After watering in the fresh planted pea seed, damn if they didn't all come up thick and vigorous, which was unnerving to walk through the rows with all the snakes that lived in that ditch.
The Cow peas came off first, and we harvested a bunch of them. Then we had a big rain event, and some kind of blight broke out on the leaves. The Cream Zippers were ready to harvest by then, and we were standing there looking, and I said we need to pick them tomorrow morning. They were big and fat like the pic above in this thread. When we went out the next morning to pick, they were all gone, and there was deer tracks all around the patch. End of that crop.
There are big pea farms around here, that constantly fight off the deer. A friend of mine tried to control them for one farmer, by putting fire crackers, with the fuses threaded into a long piece of cotton string and hung in a tree. As the string slowly burned up, a fire cracker would pop every now and then. It didn't work, the deer got used to it. I've heard of farmers staking out guard dogs around the perimeter of the field, but when the dogs went to sleep, the deer just ran past the dogs and into the field.
So, one night, my friend went out into the field with a spot light, and the deer were so full of peas, they couldn't even get up to run away. He shot 23 deer that night in the field, which is legal in Texas to protect crops. He spent all the next day processing the deer for freezer storage at everyone he knew that had freezer space.