We are into our third year of camping in our Khyam Montreal and I have how to keep everybody warm and snug at night (thanks MN) but last year when we went we had to get out and stay out of the tent by 10am as it was sooooo hot inside.I appreciate it will be warmer in our polyester tent rather than a poly/cotton one (working on hubby for an upgrade one day) but do you have any tips for keeping the tent cool other than open all doors and windows?Any ideas or advice would be great. Thanks.