Why don't you change your basal insulin timing if you find it hard to remember on a night and fall asleep, you could take it on a morning, lunch or early evening? Lantus can be injected any-time of the day, I use to take it before bed then starting to inject it early evening around the same time that I had my evening meal.
With regards to forgetting a basal dose before bed, my DSN told me to to take half the dose the following morning and just inject the full dose on the night, pointing out that they'd be a slight overlap so checking bg levels in the early hours was advisable.