Now see, Greg...he took you seriously! Daniel, do NOT use a bagged dethatcher...he was just joking with you, because he knows. A bagged dethatcher just fills up WAY too quickly, and you will be spending WAYYY too much time messin' with this bagger setup than you will getting the actual job done. Once the stuff is surfaced, if you don't have a large bagging setup for your mower (like a cyclone rake, Ultra-vac, etc.), then you can use blowers...just make several rows or piles to remove with the tarps. The reason I say make several piles, is so you don't spend too much time trying to push larger masses without covering that much ground (after your rows start getting built up with the blower(s)). There is a variable point - at which it is more time worthy to break off and start another row/pile with the blower(s). This all depends of course on the amount of mass you're moving - compared to the power and movement of your blower(s). think of it as kind of like raking...Once you get a row built up so heavy, you can move on to a fresh area and cover much more ground.
Now, on this...you can even use your mower to windrow this stuff a bit...It's faster than blowers or rakes. then,...just pull your tarp along the rows and pick up the debris. Don't waste time "making piles"...you're only spending time and energy raking into a direction that is unproductive. Not only that, but you are forming piles that are NOW even heavier to move onto a tarp. Understand what I'm saying? Oh,...and also,...when you do you tarp your rows, start picking up from the point furthest wawy from wherever you are going to deposit the material. that way, you are not spending energy pulling material away from where it ultimately has to go...I hope this helps!