Congrats on the new house! I agree, no veg in with the creosote, but it sounds like a great place for flowers. In a pinch, for the back, have you considered raised beds? Lined, to keep the raised bed soil away from the contaminated soil?
The trip ended up being 3,960 miles and I'm really beat from all that driving. We got in on Sunday, but I finally stopped in just to check the status of my garden yesterday. OMG, it's turned into a jungle of weeds.
The lady who was watering my tomatoes for me didn't harvest them (although invited to do so) and so now there's rotting tomatoes on the vine and ground, some half-eaten on the vines. It's going to take a few hours to get that patch into shape again. But it's doable, and we might still get a few tomatoes out of it. Worst case, our local farm stand is selling "canning" tomatoes at 30 pounds for $30. (The misshapen ones they can't sell in the shop because they're ugly.)
The squash plants are half-again as big as when I left and running amok everywhere. There's a bit of mildew on some leaves, but I can deal with that. Overall, things seem to still be alive, more or less. She told me there was a tremendous heat wave right after I'd left, and then just before we got home they got hit with massive rain from the remains of a hurricane (Debbie?). I'd believe that - the place was kind of swampy. But it's all in absolutely dismal shape. Peppers rotting on the plants, weeds up to my waist, plants fallen over onto the ground... At least it's mostly all alive and with some more sweat equity it'll be back to a garden for at least the month or two we have left for things to grow in it.
On the soil testing, here we use a private company and just get the basic nutrient testing. They also offer an in-depth service that discusses micronutrients and any pollutants, but I haven't needed to use that, thankfully. In both cases they also say how much of what nutrient (PKN, etc.) to add to the soil and in what quantity for the plants I listed as going to be planted in it. Hopefully you can find a good company there. It's worth it to do it every few years, and definitely before your first year so you know what you're dealing with.
Again, congrats on your new place and condolences on the insanity involved in the moving process!