I have a 12 x 16 Reliable Tent with 5' walls. I avoided the internal frame as the traditional pole system is lighter (and cheaper)and can be easier to set up on uneven ground. The tent leaked at the seams which was not good. They sent me a can of sealer at no charge I have not had it in the rain to see if it still leaks. I would recommend that you get lightweight cots high enough off the ground to store gear under the bed, this will work wonders for tent space. I bought waterproof duffle bags that are used in canoesto store gear in.
www.sierratradingpost.com That way you dont worry about storing them under the cot. We had 4 hunters and a stove and things worked out well. Mildew and rot resistance are an absolute must and fire resistance is required in some states. You did not mention a stove but I would highley recommend one. They are available at less than 20 lbs and are nice not just for the heat which is obvious butours kept things bone dry (even after the leak) and extremely comfortable.