I think leaving the rabbits at home and hiring a sitter would be the least stressful, since they will be in their own familiar environment.
I recently went away for one week, and had a few friends take turns watching them. They came by twice per day to give food and water and treats. When I came home, the buns were super excited to see me and acted like nothing had happened. It was a huge weight off my mind while I was gone.
Definitely find someone you trust being in your house while you're away, and who has some experience with pets. Have them come over a few times beforehand to get to know your schedule and how to care for the rabbit.
I also left detailed printed instructions, and a list of emergency contact phone numbers and the vet's phone number, just in case. I labeled the rabbit food in the fridge and how much should be given of each type of vegetable. If you set everything up to be fool-proof it will be easier and you won't have them calling you asking questions.