You're all gonna laugh at me, but I have a pretty dumb question. How does one get cattle panels home from the store? I've got a full size van, but no pickup. Can I tie them down on the roof? Will they be OK up there? do they need extra support? I'm having a hard time visualizing them in relation to the size of the van. It's about 5 miles to TSC, part of it on a busy highway.