Well if you use Pool, and they get the name, you will potentially have to bid against yourself, even if you are the only one bidding! Because in the sealed bidding phase you have no idea how much, if any, others are bidding. And beware that your initial bid is not a proxy bid, so even with no other bidders you will have to pay the whole amount you entered (in phase one).
But that's a different issue. You could bid at eNom and Namewinner, and watch the bids closely prior to drop time. If you aren't outbid at Namewinner, and the CLubDrop bid stays at $10, there is a good chance you don't need to use Pool or Snapnames. But there is always a risk, and other players in the game may grab the name without using any of the drop services.