Um, as long as you keep the other plants far enough away from the fruiting bushes/grape vines, and insure that the squash and beans don't come and take over, you should be OK.

You might want to put up a cylinder of hardware cloth about 3 to 4 feet in diameter, with a fine mesh, and taller than the bushes will grow this season, around each plant, just to guarantee that they won't get smothered.

Otherwise, as long as you water and fertilize so that everybody is happy, I don't see a problem with it.

I've often companion planted around young plants as you suggest, but I do try NOT to use thing that are really rampant or tall, for the reason stated above.

Dennis
SE Michigan

Is your garden area fenced against deer? I'm also in MO, about the middle, and the deer around my place would have a fine time turning your new trees into shrubs and the shrubs into deer poop.

Chuck