Unfortunately with Disney there is nothing 'basic' If you are set on having your vow renewal at Disney, you have to go through Disney Fairy Tale Weddings DFTW
We are doing our vow renewal on the Disney Wonder and it's much more affordable.
For 2009 the basic Escape Ceremony for 20 people (including bride and groom) is $4,500 for outside locations and $5,500 for the Wedding Pavilion. It includes two Annual Passes, a bouquet and boutonniere, cake, Champagne for 4-6 people, 4 hours of limo, a basic 2-hour photography package, and a violinist. You would have to arrange your own meal afterward at a restaurant (if you want one). You are required to make a 4-night reservation at a Disney resort and find your own officiant.
(Weddings and vow renewals are treated interchangeably at WDW.)
Disney Cruise Line weddings start at $3,698 and, of course, include the cruise!