Have a client with a country club that is looking for a camera to keep an eye on some fishy behavior going on in the boiler/utility room area. He wants it to be covert and requested wireless because he wants us to get in and out of there very quickly. He doesn't want anyone other than himself to know about it. I am not sure of any that combine wireless, covert, and the ability to capture images in the dark. Anyone have any suggestions?

Be sure the client knows that a wireless camera needs wires for power.

Have you ever seen an IR camera... assuming you mean it's got IR emitters... where the emitters don't have a faint glow? I've not bothered with the idea of covert cameras because of this. I suspect it might be pricey.

Wireless might take some adjusting or repositioning unless the reciever is nearby. Law & Order, which repeatedly has cameras located within A BLOCK of their receivers, is NOT the model here, and you have to be sure your client knows about that. Be sure he knows you can't blow up a six pixel wide image of a license plate and read the thing, too.

Client knows they need power. There is power in place already. I let him know that IR cameras have a red glow in zero or low light. I was not sure of any covert/wireless/IR cameras so I let him know I have to look into it.

[Link: mobotix.com]

Thats a tough one, with all 3 requirements.
This is what I use for covert. It's not wireless but you could add a wireless transceiver

[Link: supercircuits.com]

Yeah, two of the requirements would have been a lot easier to find. All three makes it tougher. I have used a similar PIR in the past. It was what I was thinking about until he threw in the need for wireless. Something to consider with the transceiver though.