I also train a lot (am a PT) but as bulkbiker says, don't find the need to carb load pre trainnig because I am adapted to using fat and don't want to gain fat. If you feel the need to snack prior to training that suggests unstable blood sugars caused by eating too many carbs in the previous meal or maybe the snack is just a habit?
What are your training aims? If trying to improve metabolic health I would swap a cariio session or 2 for a resistance based one to improve insulin sensitivity.
If you stick with cardio then post training is a good time to replenish glycogen in your muscles with a snack that combines protein and carbs e.g. chicken or egg sandwich, nut butter on oatcakes, banana and nuts or a protein bar though I prefer real food these can be a handy treat. The combo of protein with carbs should slow down the absorption of the carbs whilst replenishing muscles with glucose (glycogen). Protein is vital for repairing those muscles too. The next meal could be protein and fat based with carb in the form of veg.
If you take the low(or lower) carb route then allow for time for your body to adjust to its new fuelling system particularly if you are used to eating plenty of carb meals and snacks.
