This is a shot in the dark, but there are only 2 public places in Stafford to put your boat in (Willow Landing and Hope Springs).  They both charge $15/$20 respectively.  I'm looking to drop my kayak in, in-and-out in like 5 mins.  I don't even need to use the dock.  Does anyone know of a spot on the Aquia to put a kayak in?  Lately I've been going to Government Island, but I have to carry my gear about 400 yards before I get to a good spot to launch. 

You can launch for free at Aquia Landing, which is a Stafford County park, between 8 AM and 8 PM. You have to drag/lift your kayak over a small concrete step-over divider to get it on the swimming beach, then drag your boat a few yards to the water. You can usually catch some bass in the cove west of the landing. It's fairly open out there, so the wind can be a pain. I only go there on relatively calm days. The two free ramps at Quantico (Quantico Creek and Chopawamsic Creek) are a short drive and a good option. You may need a Quantico permit there, but it's only a few bucks. (I'm a senior citizen, exempt.)