I was reading about weight lifters on another site who do a "carb-up" on the weekends and then low-carb all week. They seem to do fine with this. I'm assuming that is with some intense workouts as well. One guy gave a list of foods he ate in one day...get this..
18,000 calories
5 pounds of smarties (candy)
8 protein shakes
whole bunch of chicken and so on....
basically he ate a ton of carbs but then in two days he was back down to original weight.

I wonder after getting down to the weight I want to be if I could do the "carb-up" on weekend as long as I'm working out.