That is exactly how I am doing it today.
Sometimes it sounds ok but most time it does not sound as I want it to sound.
Everything sounds the same!
I have allmost all the styles there is but I can only find 8-10 campfire styles and they are basically only 2-3 different guitar strums that are used and then added second guitar, base, fingerpicking etc.
All songs sound more or less the same (often very lame) there is no way to get any variation in the intensity of strumming or variation.
Maybe whats needed are more "campfire" styles to chose from. I don't know. I only know that the backing track does not sound as I want it to sound.