My tip of the day, assume that the local raccoons have mastered how to open an Ortlieb bag without needing to unclip the straps. Last week the damn things were able to unroll my pannier and get into my freeze dried spaghetti meal, made a mess of everything.
Oh, and always try to camp near a picnic table so you can lay out and organize all your stuff that's coated with freeze dried marinara powder going back into your panniers in the morning.