Argh! Hate those nasty things. Wish I could find soldier beetles.
I read in Mother Earth News that they like to hide under boards, so if you lay a few small boards on the soil around the plants, they will hide and you can flip the boards and squish them. I haven't seen the buggers yet, so I can't vouch for this method, but I'm sure it'll be soon.
We did better than I thought we would. We used the lime that Iddee recommended, plus DE on the ground under the plants, plus we mixed the pepper spray solution with vegetable oil and a crushed aspirin in a sprayer and used it all over the garden. We are finally getting a few cucumbers here and there, we have a half dozen watermelons fixing to get ripe, the tomatoes that didn't get killed are going to town now, and I got a few squashes. We still go out with the duct tape and pull the eggs off when we see them, which isn't real often now.
We also ended up battling with the vine borers at the same time! Little Man took some BT out in a syringe and injected the stem of every plant then covered the scar over with rabbit manure and after a little pout time the plants are starting to perk up and bloom!
My (?) squash bugs were all out of synch this year. I had squash coming in, and no bugs. After a couple weeks, I saw eggs on the leaves, and picked them off. By the time I saw a few adults, the squash was past and I pulled the plants. Let's hope this disrupts their cycle. (yeah, right!)