Couple of ideas:
For the first year it might be good to go on the shorter side and do a 3 days of competition and 1 day of prologue. This way it costs a little less to put on and gives you a chance to see how all the pieces go. Between organizing course marshals, controls, medical crews etc I imagine its a handful for the first time. It would be great to see a full 7 day event in North America come from this.
The Australian Safari had several different bivouac locations during the week but some were used for a couple of days in a row. There is another event in Australia called the Condo 750 and it is 2 days long and very navigation intensive. They have 2 loops and its setup so on day 1 the bikes and quads head out on loop #1 while the trucks and buggies go out on Loop #2. The next day they switch loops. This eliminates the dangers of bikes and trucks mixing things up.
My intuition nearly makes up for my lack of good judgement.
Just installed my new trolling motor