We have a 2015 34e Windsport. Our drain is in the compartment with the fresh water/sewer connection right at the bottom( blue hose white/silver valve)
You may want to look where your water tank is( probably near the water pump)
It's a good idea to blow the lines out with air and add anti freeze to the sink/shower traps.
Last resort is to run the heater tonight at a low setting with doors and draws open to get heat to the pipes. That will give you some time
See the valve in the second pix center pix near the blue filter. Sorry the pix are side ways I don't know how to flip them
Good luck
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