You need carbs on your OFF days to help with better / quicker recovery. I guarantee if you limited carbs on your off days you will be weaker in your next workout. Say Sunday is an OFF day but monday is Legs...if you limited carbs all day on sunday, your Leg day will suffer.....heres what i do bro:
Training days: carbs are 550-650 grams
OFF days: mostly the same except i cut out all simple carbs (no PWO
shake)....i still get around 500grams even on OFF days
i know youve heard it countless times bro: "you grow while out of the gym resting"...why would you limit nutrients at this time?

its all in your head bro, one day or two with rest + alotta good carbs will not make you into a blimp, its part of what you need to do to reach your goals, its all part of the plan
I think anyone wanting to really grow needs about 2.5-3grams of carbs per lb of bodyweight, granted everyone is different with different metabolic rates....however i think the minimum for anyone trying to bulk is 2grams per lb of bodyweight.....Carbs are anabolic and protein-sparing, they are an absolute MUST while bulking....good luck with your show prep and if i can ever help PM me!!!