Bob and Betty Cragmore are celebrating their tenth wedding anniversary by returning to the scene of their honeymoon…
to their horror, they find it a blood-soaked landscape plagued by hunger-maddened grizzly bears. Thankfully their Hehr recreational vehicle is near impregnable, and they are well-armed.
from a 1970 issue of Mobile Life. Illustration signature looks like D. (something). Head
Hang Fire Books 
That totally looks like Damnation Alley or some such thing.
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LOL! Here’s hoping I’ll never need an armor-plated motorhome. 😉
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John beat me to the comment the same thing popped right into my mind also.
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