If you were a feral momma cat ready to have your litter, where is the most likely place that you'd have them?

Ok,.We have a semi feral cat that obviously gave birth last wknd, ( her big belly is nor more, and her are rather big) and we live on a ranch. We have a workshop/shed, two storage shops and a barn, plus lots and lots of land with knee high weeds. So, where would you have your babies? We need to plow the fields and I don't wanna , if I don't know where the kittens are.