As a general rule, Beavers are not taken camping under canvas by themselves. They're sometimes still a bit attached to Mum's apron strings and can need high leader to Beaver ratios.
However, every other year there is a 2-night Group camp. The Cubs, Scouts (and Guides) camp under canvas whilst the younger Beavers either stay in huts or come along just for a day. The emphasis is on activities - lots to do from breakfast to supper. It's also good for the Beavers to see the activities that they can do in scouting when they get a bit older. The leaders available from other sections mean that there is more flexibility to cover any problems/emergencies in any particular section.