Traveling in large groups definitely changes a trip's dynamics. There are more people to please and organize. Places in Brazil deal with this in different ways.
In Bonito, groups have yet another challenge: The activities have limited slots for each possible time. Some places work with groups of 8, while others function with 12 at a time, there are those who make groups of 15, etc. Children, guides, babies and even drivers are considered in these numbers, so everything needs to be thought out more carefully.
When it comes to Pantanal, the group is usually able to stay together, but it is important to consider the means of transportation and places to stay carefully. Because the Pantanal is remote, options can be limited. Not all buses can go into the Pantanal, for example.
To help you with these kinds of concerns, H2O Ecoturismo e Eventos has categorized the activities that tend to work best for larger groups. These are places that have more things to do, have more space, are better prepared to serve meals in large numbers or simply better able to work with larger group logistics.