Here just north of you in SE Nebraska, by accident the sugar pies got trellised a few years ago. I use a cattle/hog panel, 4'X16', to trellis cucumbers. (maybe you need to be in the farm belt to know what a hog panel is...any farm store sells them.) There were some pumpkin vines I thought far enough away not to mix with my bush cucumbers that I train to go up the panel. Short story: the pumpkins grew over to the panel anyway and vined up and did very well for themselves. Now that is how the sugar pies get planted and trained vertically. Works for me. I use hog panels for blackberries, decorative squashes, small pumpkins and on the other side of the garden, cucumbers.