Hey, OK my 7 year old is ready for her first overnighter. She also wants to hammock like dad. She is 54 inches tall, weighs about 70 pounds. Can I get by with 1.1 or should I go ahead and get her 1.9 for her hammock? I want her to be able to use it more than once of course. I really would like to get a few years use out of it. At 54 inches tall, and potentially 64 or 66 in the next three years at the rate she's growing, I am thinking of going about 9 feet long before whipping. Any other input would be appreciated. Thanks!!