Tazz! Wow good to hear from you! I think of you and Daisylover often.

I don't have any suggestions as none of my bunner butts went for the baseboards (yeah, they preferred the carpet lol ).

If I had my own place, I'd offer to take them in for you but such is not the case. That said, don't hesitate to contact me if your pet sitter decides its too much to handle. I'm not sure what I could work out but I would definitely try my best to come up with something.

I wish you the best!

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Edit to add:
After typing that, I remembered something that a ferret-friend said she used to deter chewing. http://www.bitterapple.com/
You might have your petsitter check with a vet to make sure it's bunny safe, though. Hope that helps!