Overall the models look great. The camo net, as has been said, is a bit weak and can be remedied easily.
As has been stated above, a gauze bandage soaked in a mix of water and white glue will create a more realistic droop and look more like a real net. Additionally, you'll want to add support cables and stakes for the poles and for the actual net as well. I've linked to an ok example. Not the best. But you can see the netting extends almost to the ground. The corners and middles (except for the barrel side) should also be staked to prevent the net flying off in the wind.