Hey y'all, two of my friends and I are going to a festival soon. Were camping at the festival and it will be a first time for the three of us. We already know the basic do's and don'ts, but there's one thing we are completely useless about: a tent. We know it needs to be waterproof and big enough for the three of us, but there are some points we keep going back and forth on, and we would really like some advice:

1. Do we buy a tent for 3 people, or for 4 people? 4 people is a bit more spacious, but is it worth the extra money?
2. Does the tent need to include a little entryway-thing? Where you can put your dirty boots and bags? (I think it would be handy, one of my friends thinks that if we buy a tent for 4 people, our bags can fit in with us and we wouldn't need the entryway-thing)
3. If we go for a tent with an entryway, does it need to have a ground cover? (Again, I think that would be best cuz if it rains our stuff gets dirty and wet, but my friends have different opinions).
4. The place we're gonna buy a tent from has tents with 'fresh and black'-technology, basically meaning you're tent won't get as warm if it's a hot day and sunlight won't come in that easily. I really like this idea, but we're not sure if that's worth the extra money (Could I instead bring an eyemask so I won't get woken up by the sunlight?)
5. Are mosquito nets a must-include?

Thanks in advance! We really appreciate any help we get!! :)