Based upon that info and Google Maps https://www.google.co.uk/maps/place/Chemin+des+Bordages,+72230+Arnage,+France/@47.9304171,0.2048835,15z/data=!4m2!3m1!1s0x47e28fd2366db2b5:0xeda75e145976b85c you will need to head north / west towards the D92 (the Arnage village east west road), then turn right (east) on the D92 until you are back at the D139 (there is a roundabout here).
Then head north up the D139 to the grandstands / main entrance or you can also view the racing adjacent to the roundabout (the Porsche Curves viewing area).
Unless you have a car park pass near the main entrance, walking or cycling is your best option.
Hopefully the attached makes some sense to you.
Hello Cecil,
Welcome to Club Arnage!
Looking at where you are staying, the nearest viewing area for you would be on the outside at Porsche Curves (accessible) just by the bridge where the circuit goes over the D92.
This is one of my favourite places to view (photo) - especially as the sun comes up on Sunday morning - you get a great view of the first light falling over the various campsites, and right up to ferris wheel and ACO tower by the pits straight. Also you can just see across to the Dunlop Bridge.
(You can access the inside of those curves by walking through the Beausejour camp site).
Also from the Bridge or BSJ, you can catch the little trains or shuttle buses to either the Antares Entrance (The tram stop) which is the entrance on the inside or Tertre Rouge, or via a combination of trains you can get to the Main entrance near to the Auto Museum but on the inside of the circuit in the hospitality village.
You can also access the GA area at the entrance to Arnage corner and walk down to the exit of Indianapolis, but not any further than the corner (so not up the Indianapolis straight).
From experience, you might run into problems taking to the fields, better to stick to the beaten tracks.
I think that you will quickly be moved on by Fat Controllers or even Gendarme if you are trying to view from an "unofficial" area. But maybe if you speak to the locals in Arnage there might be "known" places.
If you are shorter than say 6foot, you might be better getting a Grandstand (Tribunes) seat if you want a good view of the Start and Finish (Plus better for Photo Ops!). The standing terrace is OK, but you will need to get there at 7am to get a good spot and wait until the start!!
Any stand on the outside circuit gives better views than the tribunes above the pit boxes.
Dean