So far, I haven't found a station near our route that has e85. Most of the ones listed on Holiday's website, and the government alt fuel maps are not selling it anymore. So yeah, you will want to bring some extra. I can normally make it about 230 miles on a tank pretty easy, but with the spirited driving I will be bringing another 5 gallons.
Here is the closest station to the meeting place.
The closest one in duluth is 8 miles from the hotel.
Here is the closest BP to the meeting spot. If you want to top off with some good 93