I was wondering about whether or not on very rare occasions it's okay to use up your daily allotment (or at least much of it) on an otherwise unallowed food?

Example (because that's way to vague a question ) - I'm going to be travelling home for a week next week, and my family is 100% supportive of LC, and my mother gets right into it. Since I plan to stick to the plan completely while travelling, I was wondering about planning one "slight" indulgence while on vacqation. One of my favorite meals is tacos. While taco salad is good, I do miss the crunch of the taco shell. 3 Old El Paso shells has 19 g - 2 g fiber = 17 g carbs. I don't want to risk it if it's going to cause a setback - I guess I'm asking both about 'cheating' within the limits, and whether anyone knows how big an impact on BS taco shells have

Has anyone planned a "within carb limits" indulgence? What were your results?

Wynter