We have a 14 x 16 with 5 foot walls and a 10 x 12 cook tent to keep the cooking out of the main tent. It is comfortable for 2-4 adults and cots, with a fold up table in the middle for BS'ing and playing cards in the evening, along with the wood stove in the corner. 5 have fit in a pinch but it is getting crowded. For 6 all in the same tent you would need a 16 x 20 and a cook tent about the size of ours. Good cots, a corner located wood stove, and good organization helps to make the most of the square footage with that many people.
For our cook tent, we got the biggest camp kitchen set up Cabela's sells and it works great for us. 2 stoves set up so we can cook different things on each stove and not be stepping all over each other and a prep table is perfect. Also comes with canvas "cabinets" under the camp kitchen for storing goods and a shelf for pots and pans. A couple small fold up or roll up tables for cleaning dishes and post and pans and the rest of the floor space along the walls for storing coolers, water, etc.. and you've got a comfy camp.
Check out the walltentshop.com for tents. We got ours there along with several people we know and we've been very happy with the quality of the tent and the service. Best prices I've seen anywhere. We got the Wilderness tents and they have been a terrific set up for us.
Bob
The two tent setup is the way to go. One for cooking and eating, the other for sleeping.
Not having to continually move stuff around saves a lot of churn on a trip.
