Rukelion truly didn't want to leave Daisy but he had to. He knew she would still be waiting for him when he did eventually come back since she didn't even want to get married but he couldn't help but be worried. What if something else happened to her while he was gone?
He wanted to believe the Krinzels would watch out for her but they also weren't at the farm all the time. They had their own lives and responsibilities, especially Callum since he had one small child to contend with and another on the way. Braedon had managed to find himself a sweetheart as well and was planning to marry her in the spring so he wasn't likely to be of much help either.
Another potential worry was that whatever farmhands Daisy hired with the money he sent back might not be trustworthy. Hopefully the Krinzels would keep them in line since they seemed to care about her in some capacity.