This may be a really stupid question, but is this ride hard (for a 600)?. I am looking to do a relatively easy one for my first ever 600.
IMO a relatively easy 600 is one that provides a sleep stop and has terrain that suits you. Only For Softies returns to base part way through which means you could maybe kip in your car or a strategically placed tent. You can carry only stuff you need for the first 'loop' and re load or swap round or deposit stuff as you pass your 'depot'.
The Three Coasts 600 does this too, which was my first 600 and worked very well. I actually considered a different bike for the second loop, it would be completed in daylight so no lights would be needed and for 225km I would need to carry much at all. At least one riders deposited his dynamo hub wheel for a lighter one.