looking for advice... I am planning on this ride next year, not sure what distance I will attempt yet, what ideas for training and planning can anyone recommend?

So I am considering taking on this trail that some many have written about.. Contimplating the 300 version for my 1st time. I am a weekend rider, yet have done some local racing with the MBAA this spring. Want to add to the infamous bucket list. Look to gain insight an dplanning ideas, and possible a riding buddy, buddies....2015 sounds a long way off, but it will be here in no time.. with teh summer heat approaching lengthly rides will be minimal... doing 20-30 mile rides now....planning the Barn Burner in Falg in Spet, at 54 miles... Please chime in....