Yes! And speaking as someone who has fostered out hundreds of cavaliers in rescue -- almost no cavalier has attachment issues. They may whine for a few minutes after you depart and will be thrilled when you return -- but in a good home boarding situation or kennel, they will be quite happy. And will not be pining away at all (as hard as that may be to hear! :lol
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ideally a pet sitter should be insured, have extra safe doors and fencing, and have references -- and never keep dogs mixed together when they are not there to to oversee them them actively. Especiall not dogs of different sizes.