I agree with PP that I would not dedicate a full day to Disney Springs. We typically visit Disney Springs in the evening after AK, where we usually end our day earlier than the other parks. We often will go more than once in the evening during our trip.
But to answer the question, Disney Springs is significantly busier on the weekends. But I think it would be manageable if you went in the morning on a weekend day. It will be quieter, but not all dining places or bars will be open, if you wanted to take advantage of getting drinks or stopping to enjoy the entertainment. Also, I've noticed during Halloween party season that evenings where the party is going on tend to be busier at Disney Springs, filled with people not attending the party. I'm not sure if it will be the same with Boo Bash, but something to consider.