Greetings Glen and Sue!
Originally Posted by MOSue56
Can we pull our new Argosy 100 miles and check the tanks when we get it to the cabin?
It isn't advisable to tow an Airstream product of the 1970s with the wast holding tanks having anything more than a minimal amout of waste in them. That being said, there shouldn't be any particular peril associated with towing your coach 100 miles without inspecting the tanks. Keep in mind, that if you don't check for contents you may have trouble dumping the tanks once you arrive at your cabin.
Another thing to consider is that should the black tank have build-up of any kind in it, this would be a good opportunity to address that by emptying a bag of ice cubes into the tank (press the flush valve on the toilet and hold open until all of the ice cubes have flowed into the tank) the ice cubes will act as a scouring device to break up any solids that have accumulated in the tank as road vibrations agitate the contents. The down-side is that you would then have a black tank that needs to be dumped when you get to your cabin.
Good luck with your coach!