Winterization

Nope.

Just because you never used the shower or the toilet, it doesn't mean that water didn't get pushed part way through the pipes leading to them.  Similarly, the line to your city water connection will be partially filled with water (the check valve is at the connection).  Don't forget your low-point drains, too - gravity ensures that they'll definitely be filled with water.  Also, your water heater tank will have partially filled, even if you've never turned on the tap for hot water.

And, don't forget about your traps - they'll likely have water in them too that must be displaced with antifreeze.

Plus, you really don't want RV antifreeze in your fresh tank.  It'll be very difficult to get the taste out come spring.

Winterizing really is very easy; a 10 minute job.  A large jug of RV antifreeze cost me $8 CDN at WalMart and is more than enough to winterize my r-pod.

 

Was your water system pressurized (pump on) when you pressed on the city water connection pin?  It may have a drainback preventer/valve on it (I know my popup did) so even if the rest of the system was pressurized you might not see any pink come backwards.  That is why I recommend using the blowout plug so you push any water in that little section of hose into the rest of the water system instead of trying to get any pink stuff to come out.  If you have easy access to the inside of your 'pod where the city connection is, you could look to see if its possible to temporarily disconnect that section of hose and drain it that way.

 

It seems odd that your monitor would show 2/3 full, based on what you say.  I've never done the "ice thing"...I've always just added 2-3 gallons of water with the blue stuff (and much prefer the liquid over the powder).  Have a nice trip to TX!