I dont take crix out of my bin to specifically gut load for feeding. I gutload at all times. I feel you should treat your feeders well because that is ultimately what is going to make your cham healthy and less susceptible to nutrition deficiencies. I have a dry gutload in my bin and also mix up my wet with romaine, apples, strawberries, sweet potato, carrots, greens, etc...
i do think that crix should have a min of 24hrs in my care and feeding them my mix before i feed them off. So just dont let yourself run out. go get more 2 days before your supplys gone .