Everywhere we go...

Not quite as nice as 'Boomalacka', because it isn't as good at a mixed campfire, but this is another good loud one. Obviously, replace the Forestdale Cub Scouts reference with your own group name. Its weakness is that it forces you to simply build the volume.

Everywhere we go,    (echo)
People always ask us,    (echo)
Who we are,    (echo)
Where we come from,    (echo)
So we tell them,    (echo)
We're the Forestdale Cub Scouts,    (echo)
The mighty, mighty, Forestdale,    (echo)
And if they don't hear us,    (echo)
We shout a little louder...    (echo)

Once you've got the loudest you can, the last verse ends with

And if they don't hear us,    (echo)
They must be deaf.    (echo)

Boomalacka!

In the middle of any campfire, there is a time when you want to let everyone know who you are. This is a nice yell with a space in the last line for you to identify yourselves; I've put in one of my old (and sadly, expired) groups. When there are a couple of groups round the fire, this can be led with yells alternately by leaders from each group. If you do that, however, it's good to have a 'joint' verse at the end to bring everyone together again.

Boomalacka, Boomalacka,
Bow wow wow,
Chingalacka, Chingalacka,
Chow chow chow,
Boomalacka, Chingalacka,
Who are we?
Forestdale Cub Scouts, can't you see?

In the 'joint' chant, something like 'We're all Cub Scouts, can't you see?' or 'Beckenham District, can't you see?' does the job very nicely.

Oggy oggy oggy!

A good way to warm up the campfire's voices is with a yell or two... in this one, the campfire leader does the 'oggy' bits and the campfire do the 'oy' bits.

Oggy Oggy Oggy!
                                    Oy Oy Oy!
Oggy Oggy Oggy!
                                    Oy Oy Oy!
Oggy!
                                    Oy!
Oggy!
                                    Oy!
Oggy Oggy Oggy!
                                    Oy Oy Oy!

We also use the 'AA Milne' versions of this...

Winnie Winnie Winnie!
                                    Pooh Pooh Pooh!
Winnie Winnie Winnie!
                                    Pooh Pooh Pooh!
Winnie!
                                    Pooh!
Winnie!
                                    Pooh!
Winnie Winnie Winnie!
                                    Pooh Pooh Pooh!

Tigger Tigger Tigger!
                                    Bounce Bounce Bounce!
Tigger Tigger Tigger!
                                    Bounce Bounce Bounce!
Tigger!
                                    Bounce!
Tigger!
                                    Bounce!
Tigger Tigger Tigger!
                                    Bounce Bounce Bounce!

I tend to use these near the beginning of the campfire if I don't seem to be getting much noise out of the circle; they are easy, and nobody has a problem remembering the words!