If I wanted to customize a full length UQ and I'm 5'5" tall how long would I need it. I do not want to mess with a ground mat inside and I am buying this UQ so I do not have to worry about being cold inside my hammock this winter. I am not sure I need 72 inches and was thinking I could cut some weight and bulk by getting a custom length. I am wanting to buy the winter incubator from HG. Thank you!