If you're not using any sort of glue, waiting a period of time after you mount the bindings isn't going to change anything.
My uncle gave me his old pair of Volant's and I remounted the binding to fit my big old boots. Filled the old holes with a combination of epoxy mixed with Scotch Brite pad pieces. Waited 24 hours. Drilled the new holes, filled the holes with epoxy, and then screwed the binding on. And no, I didn't tap the topsheet either, which some may say is a big no-no. I did screw in the screws without the bindings to make sure they went in straight and to lay down the initial threads. Those suckers aren't going anywhere, but then again, the skis and bindings are old so I wasn't worried about it being a permanent job.
Within 10 minutes the expoxy was set and the skis were probably ready to use. It was 5 minute cure epoxy, but I waited 24 hours anyways.