No idea personally, but I suggest you do a search on the 1881 census, free, (Ancestry.co.uk) for Hawkers in the Hampshire area, which will include the Isle of Wight. Not every Hawker was a romany, suggest other occupations such as horse dealer, pedlar, basket maker, tinker, brazier, etc etc etc since its all free, no reason not to try many variations of romany occupations. This should give you a few clues as to navs and stopping places.
Hope that helps.
