I think it may be a mistake to try to add any real mass when still at 21% body fat. The more fat you have, the more fat you'll tend to put on when bulking.
Appetite For Construction
A more sensible approach, since you sound like you sorta want a break, is to eat close to maint levels over the week. Keep your PWO nutrition good and maybe eat slightly larger meals in the 2-3 hours after lifting. This is when to have your carbs, too. On non-workout days, go a little lighter in the food dept., limit your carbs, etc.
I don't remember what "eating style" you settled into. Let us know. Maybe we can suggest something more specific.
As to people being as bulked as the want at 21%. Is that a typo? Do you mean 12%?