It sounds like Fluffer's needs are being well thought out, and I hope the bonding goes well.
As for rabbits and dogs - I would keep them entirely separate. My rabbits have a separately fenced off part of the garden that the dogs never go in. Although mine are lurchers and would undoubtedly chase anything in the garden if the fancy took them (one objects to the blackbirds in his garden), I wouldn't trust any dog to have direct contact or share an unprotected space with rabbits - accidents happen. Rabbits are so easily spooked or injured that it is just not worth the risk.
My rabbits don't mind the dogs (mine or visiting dogs of various breeds) as long as they are safe behind the wire fence (or a baby gate if they are inside). They are not even bothered if they get barked at.
You need to watch out for other predators as well - cats, foxes, birds of prey, uninvited people, etc. - which is another good reason to have a safe area for the rabbits. Any time spent free ranging in the garden needs to be fully supervised.
