Weight training is not so "glycogen-depleting" as some think.
But I've always found that pre-during-post supply of carbs is the best way for lean physique. I've used the cheapest method with rice/oats pre, dextrose during and oats post-workout.
It's great. Supplies you with energy for the workout, suppresses appetite for the rest of the day, esp. your "tooth for sweet". And remember, getting in productive and quality workouts is paramount, because the better are your workouts, the more energy you burn and also, the metabolic impact which you'll get is also affected positively.
So yeah, carbz are good for fat loss if utilised properly in the right time!