I would not take secondary unknown roads towing an RV.
It IS one of the big reasons I switched to a MH towing a toad. MH breaks down I throw the dogs in the toad and go.
The first time I broke down in the MH "I" almost had a breakdown then I remembered I have a toad now. Unhooked, threw the dogs in, and threw the keys to the MH to the tow truck driver and said call me when its fixed. :C
IMHO the toad takes all the worry out about traveling especially if you RV with your pets.
I do carry 2 phones with 2 different providers AND a hand held "Cobra RoadTrip CB" radio which also has a weather alert radio and optional antenna and plug in for vehicle use. Came in handy on several occasions.