I did some research today while in town. I found a product called Onslought. You mix it with either meat or fruit juice and the yellow jackets will take it back to their nest and it kills the entire colony. In the early spring and summer the yellow jackets feed mostly on meat, late summer/fall they feed on fruit juice. Right now its on back order.
Dealing with the weather isn't a real problem, we can work around it by the methods mentioned above. It's the vermin that is more difficult to handle, with grasshoppers, yellow jackets, voles, gophers, chipmunks, squirrels and rabbits being on top of the list. Not sure if there's anything that can be done with the grasshoppers. They're about 4" long right now. I shoot, trap and poison the rodents.
Our growing season is so short that there are very few things that we can replant in case of a failure. We're supposed to be down in the lower 40's later this week, so we'll be covering the tomatoes and peppers. Next year I'll build some cold frames so we can start planting earlier in the spring. The wife has a greenhouse ($6000) on order that won't be delivered until next spring. I'll also put in an irrigation system, more raised beds and terraces to make watering easier and should save on water too. The garden is on a slope so the water tends to run off.