Are you sure you are not taking too many butt pictures for your calendar? For example for the construction shoot, why not the boots, daisy duke shorts and a one of those reflective vests (I think Home Depot sells them)? Don't get me wrong, you have a great butt, but the photos might start too look too similar if it becomes the main focus.

"Six months of the calendar show my butt, the other six focus on the front side.  Keeping with the theme of the calendar, I was trying to recreate this classic Jim French photo, but didn't have time to adjust my pose before being chased off the construction site." -- Noodles and Beef