David Rawson helps to make hand-operated water filters sent to disaster zones around the world.
The cottages were built 250 years ago to house workers at a water-powered cotton spinning mill.
Harris, five, was in hospital two years ago when a local biker group arrived with Easter eggs.
The event will include workshops, demonstrations, performances, parades and activities for all ages.
The county council says no-one is believed to have been injured when the tree fell on the road.
Via Gellia in Derbyshire will remain closed overnight due to unstable trees along the route.
Matlock Rugby Club now has permission to build its new clubhouse in Cromford.
The Arkwright Society is planning a major restoration of the Unesco World Heritage Site.
The centre closed in 2006 and officials at Peak UK Kayaking say they want to "inspire local people".
