For your squash borers, there are a couple of good strategies that I've employed.
The first is to grow cucurbita moschata (e.g. Butternut) squash varieties, which has a solid vine that the borers avoid.
The second is to grow cucurbita maxima (e.g. Hubbard, Buttercup) or cucurbita pepo (Acorn, Delicata, Spaghetti) varieties and every two weeks use a large syringe inject a bacillus thuringiensis (BT) solution into the base of the vine. This is organic and will kill the vine borers. But you have to do it every two weeks or so. This works really well (100%).
A third strategy that I've used but without much success is to cover the vines every three feet with hills of dirt so they re-root in these places and if the vine borers kill off the plant at the base, you still have some rooted vines. This works ok, but seems to reduce yield a lot if the main vines are infested with borers.
I've tried wrapping the base of the vines with old nylons. Not only does this take a lot of time, if doesn't seem to work really well - you can never cover 100% of the vine. Using some type of tent or cover over the young vines seems like a lot of work for a (not likely) result, and I haven't tried this.
I have read that commercial growers use a trap crop of Hubbard squash, which the borers prefer above all, to draw borers away from the main crop. This is planted around the perimeter of the field. I have not tried this. I'm usually trying to grow the Hubbard squash for eating, and I rely on stategy #2.
Good luck and let us know how you do.