I'd be careful when towing with a crossover, especially the Flex. That is similar to towing with a full-sized car (back when you could as an option). It is not the best idea in the world since they are low to the ground stock. But that depends on the weight of the pop-up. Flex towing is more for a small utility trailer. But when I think about it...it might work. I've seen a couple pics of Flexes towing a small low profile camper.