i just served 8 kegs at a wedding. i put the kegs in 2 trash cans the night before, filled with ice. the next day, dumped all the melt, replaced ice, and was good to go. no jockey box though, just picnic taps.
i imagine with the jockey, what you are planning should work.
Kegged: Berlinerweisse, Dubbel, Galaxy Wheat
Bottled: Golden Strong, Mild, IIPA, Rauch
Fermenting: Saison, Imperial Wheat Stout, Brett Saison, APA, Brett Roggenbier