Winterization ?

Yes I tried that but still still a little there. I when it comes time to winterize I plan on putting the wheels on wood to get them off the asphalt, when I do I'll lower the tongue jack enough to pump a little more out.  

What concerned me was that there is enough water that there is still some in the fitting that connects the pump supply line to the tank.

While putting my cover on today, I realized that my fresh water tank still had several gallons of water in it even after draining. This was because the drain is not the low point of the tank. I used the pump to to draw the level down more, Think I will remove the hose that draws water to the pump to remove more water or add a little antifreeze when it comes time to winterizing.

Or I guess I could jack up one side of the pod to drain it.

I don't consider it either/or.  First you blow out the system which removes a lot of water and clears the city water connection, then you use antifreeze.  You risk diluting the antifreeze if you don't use enough of it, if you don't first blow out the water.

If you use the blow-out plug in step 2 that will clear the city water connection.  Alternatively if you don't blow out the system first you will need to use a little more antifreeze to clear out the water.  As Leo mentioned, then you can pull the screen off of the city water connection and press in the one-way valve to release some antifreeze.