Police say the strongest possibility is that the girls are still in the area near Soham.
Kim Botting, chair of the Soham Carnival said it would be an ideal way to celebrate its diamond anniversary.
The 60th Soham Carnival and Heavy Horse Show takes place on 27 May.
Mr Huntley denies murdering the girls, who vanished from Soham in August 2002.
The Yachtsmen lost at home to Haverhill Rovers while their championship rivals, Soham Town Rangers and Needham Market, both won.
Detectives have also been granted a 36-hour extension to continue questioning Soham college caretaker Ian Huntley, 28, and his girlfriend Maxine Carr, 25.
Tests are continuing on a white van seized on Wednesday from a caravan park in Wentworth, about 10 miles from Soham.
At Sunday's briefing in front of St Andrew's Church in Soham, Mr Hoddy called for a moment's silence in memory of the two girls.
Detailed discussions are to take place between the district council, the police, the City of Ely Council and Soham Town Council.
East Cambridgeshire District Council is talking to the county police force about monitoring the Ely and Soham CCTV from Ely Police Station.
The home of Mr Huntley's father Kevin, in Littleport, which is about 10 miles from Soham, has also been searched by the police.
The scheme was recommended by the Bichard report into the Soham murders of Holly Wells and Jessica Chapman by college caretaker Ian Huntley.
Kevin Wells, who still lives in Soham, Cambridgeshire, said he could have cried with "joy and relief" after seeing the work of Grief Encounter.
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James Palmer, councillor for Soham North, said it was encouraging news.
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Results were announced at the Ross Peers Sports Centre in Soham.
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And on Sunday the Q8 petrol station, south of Soham, was cordoned off where there was a reported sighting of the girls on the evening they disappeared.
After one of Britain's biggest police searches, the bodies of two ten-year-old girls missing for 17 days from their homes in Soham, Cambridgeshire, were discovered in a nearby wood.
Criminal record checks were beefed up after the case of Ian Huntley, who was jailed for life in 2003 for the murder of Holly Wells and Jessica Chapman in Soham, Cambridgeshire.
Their house, in the grounds of the girls' primary school, St Andrew's, is being painstakingly examined by a police search team, along with the school and Soham Village College on the same site.
In its evidence to the Soham inquiry into events surrounding the murders of Holly Wells and Jessica Chapman, the union had given examples of information held on file about teachers which should never have been there in the first place.
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She promised to implement the proposals recommended by Sir Michael Bichard in the wake of the Soham murders, and to bring the sex offenders' register in line with so-called List 99 - the "blacklist" of people banned from working in schools.
The number of very serious child murders over the past few years hasn't altered and yet when an incident occurs, like happened tragically in Soham, people in every city in the country begin to feel under threat and to protect their children.
The policeman who counts is Detective-Superintendent David Hankins and he publicly, several times this week, in my presence when I was at Soham one day, welcomed the reward offers from newspapers, The Sun and the News of the World's combined offer, and he said how grateful the parents of both Holly and Jessica were at this direct reward support from the media.
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