[support] Entering data into taxonomy

I have need to let 6 users add or update data in taxonomy fields which provide drop down menus for Town. Locality and Venue. I have an editor's page and menu for such purpose where those select users can view taxonomy data in views and select from the menu to add a new term to now of the above vocabularies. In Permissions: 'Administer Vocabularies and Terms' permits this but they can alter taxonomy fields and display. Switch off 'Administer Vocabularies and Terms' and the menu items disappear, they cannot add data. Is there any way to allow the users to add taxo data but not have the degree of admin access? I'm a bit stuck on how to do this, help would be appreciated. thanks Roger