I agree with Reefdiva that enforcement is really going to depend on the day, the flight, and the people helping you. It looks like the overage fees are not too bad, but as I said earlier, the planes are small and space is limited so a back-up plan is a good idea.
Another idea for losing some weight is taking synthetic clothes. They usually don't stretch out with wear and dry quickly. If you take two shirts for example, wear one and wash one. By the next day, the second shirt should be dry and clean. You can also flip your underwear inside out and even flip them around backwards if you need to wear them a third day!!
Have fun on the trip.
Another idea for losing some weight is taking synthetic clothes. They usually don't stretch out with wear and dry quickly. If you take two shirts for example, wear one and wash one. By the next day, the second shirt should be dry and clean. You can also flip your underwear inside out and even flip them around backwards if you need to wear them a third day!!
Have fun on the trip.