Wandering Daisy's advice is sound and should be heeded. I only wanted to re-emphasize this:

I think you need to just decide that you two will NOT ever get separated.

Even when you are camped, each of you should have a clear idea of where the other one is at all times.

Additionally, it is a good idea not to be separated from your packs. Exploratory hikes away from camp for the day should be accomplished bringing the ten essentials with you, even if you don't bring all your gear.