The basic pros and cons of small and big tents: Small Tents: Pros: Easier and quicker to set up Retain heat better Easier to heat up Can go in smaller areas Compact and light Cons: Less usable space Difficult to fit multiple people Large Tents: Pros: More usable space Easier to fit multiple people Cons: Harder to retain heat Takes longer to heat up Harder and longer to set up Needs more space to set up Heavier and less compact Where I live, if it is an outing with a few buddies we usually have 1 or 2 small tents because they're cheaper and easier to set up. And trf is right about the 1up rule. Try to have a tent that is 1 or 2 sizes bigger than what is planned, either for extra room for a bigger person, incase someone decides to come on short notice, or for room for extra gear. For example, if we are having 2 or 3 people in one tent, I would pick a 4 man tent because the extra room is handy. Also make sure the one you purchase has a tarpoulin or some type of weather/UV cover, and you should also purchase an extra tarp or two and some rope. You can set one tarp up for on the ground so you make way less mess inside the tent and with a second one you can make a slant roof which will help keep your tent dry and also helps protect your tent from UV, which breaks down the tent. Hope this helps.