Okay, the small silver fish that were used was usually known to me to be in the desert regions of the southwest. There are YouTubes on the old 3 sisters, but basically the fish needs to be down a foot, and since it is down that far, you do not need to wait a year to plant over the top of it. In hardpan desert scrub with not much in the way of moisture, weren't so many coons to dig that fish up. Coons can best most of the best laid plans of mice and men, conniving, thieving, nimble fingered spoilers. Coons and tree rats are on my hit list, thank heavens I don't have weasels, but I do have a red fox visits the front part of the yard. We use fencing wire on our soft sand to keep dogs from digging under fences, chickens safe from predators, that sort of thing. Be aware, depending on what you are growing thru that fencing, the fencing can be a major problem. I reckon I could understand using an 8' cattle panel staked down, but I would hesitate to use the rolls of chicken wire, or 2"x 3" rectangular stuff for garden plant protection. There will come a time you will want to lift that wire, trust me.
Edit to add, If you are planning on a 3 sisters type of garden, those were not used for fresh produce, they were used for harvesting dried fruits; dried seed corn, dried shelly beans, a hard squash like a winter squash...so it didn't matter if the plants were a mess, and impossible to get to until they were long past a fresh harvest. In that case, the coon will have your harvest if not your fish.
Fish is a fair fertilizer, but green compost does the same thing if buried a foot under a plant in small amounts, and can also be used reasonably sooner than a year. What you choose to use should suit the area you are planting in, be available without much cost as well, and natural.
