I am going to put a 120VAC outlet on each side of my bus. They will be daisy-chained together on the same circuit. Do I need a GFCI outlet for each location or just the first one in the chain (like an interior circuit)?
You can chain them together. You’ll need to make this a water tight installation. Maybe a better solution is to use a GFCI breaker or put the GFCI outlet inside and then go to water tight parts for the outside?