Guy I work with suggests putting squash and sweetcorn together. As the squash spread they climb the corn plants. I might try that this year to save space.
I've done the 3 sisters method a few times - get the sweetcorn well established first then the beans and squash. The squash don't climb , they trail where ever they like - you would have to tie them up and then support the heavy fruit as it forms.
Guy I work with suggests putting squash and sweetcorn together. As the squash spread they climb the corn plants. I might try that this year to save space.