The Field of Cloth of Gold was an historic meeting between Henry VIII and Francis I of France to solidify the Treaty of London. It ran from 7th June 1520 until 24th June 1520 and was held on a field between the English stronghold of Guînes and the French town of Ardres, to solidify the Treaty of London.
Edward Hall's Chronicle gives a detailed account of the Field of Cloth of Gold, see http://www.archive.org/stream/hallschronicleco00halluoft#page/608/mode/2up, p. 608 onwards.
The Rutland Papers includes a list of the people who accompanied Henry VIII to the Field of Cloth of Gold, along with the expenses/accounts (including food) - see https://books.google.es/books?id=GFpAAQAAMAAJ&printsec=frontcover#v=onepage&q&f=false, p. 28 onwards.
Another primary source is Letters and Papers, Foreign and Domestic, Henry VIII. See Volume 3: 855, 861, 869, 870 and 871 at http://www.british-history.ac.uk/letters-papers-hen8/vol3/pp299-319.
This video, produced by Royal Armouries, is a wonderful resource on the armour made for Henry VIII for this event: