Several Bibby families were living in caravans around Essex and were described as 'Travellers' and 'Licensed Hawkers'. Some of them also appear to have been in the circus trade. Their caravans were variously sited at Ilford, Shenfield, Prittlewell, Luton, Chelmsford, Harlow, Epping, Danbury, Hertfordshire and in a forest near Romford.
They all seem to be descended from John Bibby 1794 of Chelmsford, Essex. John was a shoemaker in 1841 and a poultry dealer in 1851. His son Charles Bibby, born about 1837, became a steam circus owner by 1901. Another son George Walter Bibby was a horse dealer in 1881.
I have a family tree if you are interested but it doesn't include any of the names that you mention.