It is always interesting to travel in a bunch. Whenever you’re traveling in a group of 15 people or more, you want to know to deal with your audience. You can rent a bus via https://bigbusco.com.au/vehicle-rentals/
You can also try carpooling but then this would be best done if your group is small. In large groups, people would try to cater to their individual needs and then again opt for individual cars. Basically, the problem of traveling together in a car is the fact that everyone does not get enough space for themselves.
Even while traveling in groups people would like to maintain an individual sense of space which is very difficult to accommodate in a car. This is where the idea of a charter bus comes in.
A charter bus is large enough to accommodate a lot of people together and make sure that everyone has their own individual space to do what they want to, and also travel together in a group at the same time.
Of course, there might not be a place to do everything for everyone but it is a big step up from the cramped backseat of a car that 10 people would be stuffed in. Also apart from the space constrains, a van has other advantages. It allows people to bring what they want on their travel.