I bought vermiculite, top soil and manure and got some composted manure from the fair grounds and mixed it all in the raised beds with my own mulch. I mulch all veggies and fruit left overs and grass clippings and just dump them in a pit I dug and sometimes throw on some dirt from the field next door making lovely soil with lots of worms. You can see how dark the soil is. I just pull any weeds right out and there are hardly any.
Last year we had about 5 large pumpkins and tons of tomatoes and squash hanging off the fencing. One year, before I put in the raised beds, I used the fencing but didn't have it stabilized and the weight of a few pumpkins pulled it down. I suggest you anchor the fencing well in order to keep it up when the melons and squash start growing heavy.
Peas, beans, melons, tomatoes and any vine will grow up rather than out and doesn't take much space. I usually buy my tomatoes however last year we had some volunteer along with some melons. This year, we had red potatoes plants come up in the mulch so I transplanted those into the shady area of the garden. The garden goes along the fence line. The only thing I haven't tried growing there is corn. I find that it takes up so much space and the frost is so late that I find it is better and cheaper to buy it from the local farmers.
You can see how long the garden is and the thing I like is that it is all accessible from the grass within arms reach. It is in the yard, it looks pretty, it gets watered with the yard and trees and we planted edible flowers so that it looks beautiful as well as tastes wonderful. We have rows of about 5 different carrots, two types of radishes, several types of lettuce, 2 types of tomatoes, many types of squashes and melons, potatoes, kale, spinach, peppers, peas, beans, onions, and a few things I planted that I couldn't remember what the seeds were from, I think cabbage or broccoli.
Happy Planting!