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There are no heated hoses that are 10 ft long.
Now you could add a couple of 2 ft extensions to a heated hose but you are going to lose a lot of the warmth unless you perhaps insulate those extensions with a hose cozy.

https://www.cpap.com/productpage/24-inc ... -ends.html

and a couple of couplings to connect them
https://www.cpap.com/productpage/hose-c ... -cpap.html

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If you are going to be camping and planning on using a battery...and the S9....you may want to look into whatever it is that changes the 24 V (that's what the S9 uses) to 12 V which is what most batteries produce.
I am not the person to ask about it though. I have a mental block.
The Respironics machines already run on 12 V so that added expense for the converter thing isn't needed.

DMEs aren't your normal source for batteries though. Insurance won't cover batteries.

You might be better off using your M series machine for camping since it is already 12 V.

this converter is needed for S9 machines to run off of battery power if using 12 V batteries
https://www.cpap.com/productpage/DC-Con ... hines.html

Unless you have deep pockets and buy this high dollar battery
https://www.cpap.com/productpage/resmed ... hines.html

Most people use deep cycle marine batteries.

Insurance won't cover any of the above though.