First time using our extendastay propane

We are visiting our son in Colorado as we start our full timing, with temps in the 20's at night we will run out of propane before we leave here.  So i hooked up our extendastay for the first time.  I have a standard gas grill bottle and figure it will last two days/nights.  I can either fill it at the camp ground or do an exchange at a gas station or grocer.

Here is our set up.

 

At 45 day and 32 at night and lots of rain we added a 25 foot heated water hose below and the extend a stay bottle 20 pound BBQ bottle hooked up above.  The bottle has lasted two nights so far and looks like it might go three but we will not push it to that.

Photo after two nights.