My husband just put me through two nights of hallucations, which involved suddenly beginning to talk to people who weren't there. Even when I woke him up, showed him our room, told him he was in our apartment and asked him who I was (which he knew) he still pointed to three "people" (who weren't there, of course) and said "What about him and him and her"?) I am waiting to get him into the neurologist who saw him in hospital (he's recently come from rehab). She felt LBD was a possibility and I want to learn more. If you've gone through this, I'd appreciate advice/feedback, etc.
When my Dad had UTI, he was seeing ants everywhere.
My husband had hallucinations and delusions (sometimes it was hard to tell which) that did not disturb him. Some of the subject matter would have disturbed me, but he took it in stride. A body in our bed? Bats in the bedroom? Yikes! But he was not frightened or disturbed. He was just reporting. He found it interesting.
In general, if the delusion/hallucination is benign there is no need to "treat" it. Don't argue with it, either. (3 am: Honey, if the bats aren't bothering you, would it be OK if we wait until daylight to deal with them?)
Does your husband have the sleep disturbance known as REM sleep behavior disorder? (Acting out dreams.) That, too, is a tell-tale sign of LBD.
I'm glad you will be seeing the neurologist soon. A great place to learn more about LBD is the Lewy Body Dementia Association website, LBDA.org.