This is a really good point. We have a big air beam tent, 6 person with an enclosed porch and a side wing bit, and it’s absolutely enormous packed up. Takes 2 of us just to manhandle it into the car.
For a festival I think you’d want something much lighter weight unless you can drive there.
I do think a big tent is excellent for families though, if you camp with cars. We camp lots in the uk and it’s brilliant to have a 3 zone tent - first part enclosed porch with camp kitchen set up inside, boxes of stuff, games (balls, cricket set etc), wet things. Then the next zone is the nice carpet area with chairs and our clothes bags tucked at the side. We all sit around in this bit all cosy at night if it’s too cold for outside, or if it’s raining in the day. Kids had an inflatable double chair in here too. Cosy and fairy lights. Then at the end it’s the bed area. We liked the “two large rooms”’set up so it’s not just wall to wall lilo in there - kids had room for their little bags of stuff and aren’t treading on each other all the time.
It helps to have the enclosed porch as you can sit there with light on for reading and it’s still darker in the kids room with the middle zone separating you out.
Would definitely recommend the “nightfall” type rooms for bedrooms - it really helped with early waking up.
We cooked in the porch area but with the front a bit - or fully - open for air circulation. Or bbq outside of the weather is good but it makes so much difference to be able to cook in a dry place.