Have you discussed with the new member to see what he thinks? If not, maybe layout both options and let him decide. He might be aligned with you already and then you don’t have an issue.

I can see your points and including him at all is very nice of you but either he is going to fit in or he won’t no matter how you introduce him. Nothing is like the feeling of opening morning. If you are nervous about turning him “loose” by himself then have him hunt with you opening morning.