As mentioned, can be hard to know what you are putting in your tank these days... I think I read somewhere, maybe on IRV2, that if it's 5% Bio - it does not even have to be noted at the pump.
I agree with the less power output, gallon for gallon between ULSD and Bio's... The higher the Bio percentage, the lower the power output.
The high the Bio percentage, the higher the risk of moisture build up.
For sure when storing, JF Biobor (Or Biobor JF?) is a no brainer to add. I also use it when I know I might be in a park for say a month or more - especially if the park is in a moist region of the country.
While I'd prefer ULSD, really hard to travel without some Bio percentages being added to your tank at a fill up from time to time...
Really should not hurt, and some say it even helps keep injectors a bit cleaner... (Not a fat, just the fodder of man boards posts!).
One other thing I do, is if I know we'll be doing some heavier mountain driving, and I have a mix of ULSD and Bio in the tank - I'll add some Cetane additive to compensate for the lower Bio Power Output... Have no idea if it helps, but I certainly believe it does not hurt
Travel safe, have fun,