slatternly - asking a question like that at this stage suggests you haven't quite got your head around low carbing yet, and are still thinking about carbs as things to miss. Whilst it's true that Bootcamp Light is more flexible, and you can introduce more carbs, you still (if you want to lose weight) can't expect to suddenly have a massively carby day every week - if that's what you're planning!
For me, the biggest change - and what got me truly into the low carb zone - was after I read more about carbs and their impact on our bodies and our health - especially our long term health.
So now, when I look at things like sugar, chocolate, pastry, white bread - although I still recognise them as tasty treats - I also see them as the work of the devil!!!
If you can bear it, I really recommend that you read Gary Taubes' book, "The Diet Delusion", as well as Dr John Briffa's book "Escape the Diet Trap", both of which talk more about long term health as well as weight loss.
I don't know about introducing an occasional carby meal. Certainly I have heard that it can break a stall, but I don't really know why that should be. My main concern is that it would simply impact negatively on weight loss and also trigger carb cravings, and make it very hard to get back on the low carb wagon after that one meal/day.