Got a question for the backpack hunters....I’ve been shopping for a 2 person backpack tent. As you know, the lighter they are, the more they cost. I’ve been looking at tents like the big Agnes copper spur, msr hubba hubba, and marmot tungsten ul. Do you need to buy a separate footprint? If so, why don’t the tent makers just make the tent floor that much tougher to start with?... I don’t see why a footprint would need to cost $75?... would a contractor trash bag work work as a footprint? If you can hear screaming, that is me pinching pennies!!!