I have never tried to ice fish these lakes but have looked into it a bit. From what I could find, being spring fed, the lakes do not form a ton of ice because the water temp stays a little warmer. A little ice forms on the cove in Wade but the lake doesn't close (at least not in any picture or video or report I have found). I know there are a few posts in the Fishing reports and conditions section of the forum. But, it seems most people who have ever ice fished these lakes go in on snowmobiles during the middle of ice season.
If you find other information indicating that they are fishable, please post it here or send a PM. Definitely something I have been itching to try after so many fun times fly fishing these waters.