I’ve never had issues with behavior after having pet sitters, aside from extra binkys when we get home.
I think as long as he gets some run-around time each day, he will be fine. Are you comfortable with them letting him be free range while there are there? You can suggest that they feed him in the enclosed area when they are ready to leave so he goes back in.
Even if not, 10′ x 10′ is enough space, especially for a few days. Whenever we return from a trip, our buns are happy to see us, but don’t act too different from when we return from work each day. I do notice my buns tend to eat WAY more hay when we are gone, so be sure to have them top up his hay, and maybe give him some extra toys and things to chew to prevent boredom.
There is a great pet-sitter’s guide on this site:https://binkybunny.com/BUNNYINFO/tabid/53/CategoryID/24/PID/940/Default.aspx
The main things to go over with your pet-sitters are health related. I also recommend having them go in the morning and/or evening, when bunnies are most active, to make sure he gets interaction and exercise when they are there. If they can come meet your bun before, and hand feed him in your presence, he might be less afraid of them when they come on their own.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.