Complex sentence: Free to owners of Forest River and affiliated brands (such as Coachmen and Dynamax) products, it organizes group trips and rallies which vary in size from small local gatherings to the annual FROG International Rally at the Elkhart County Fairgrounds in Goshen, Indiana.
Split into simpler sentences: Free to owners of Forest River and affiliated brands products, it organizes group trips and rallies. These vary in size from small local gatherings to the annual FROG International Rally in Goshen, Indiana.