Well, the webpage doesn't seem to be coming up for me so I can't peruse whatever specific rules they might have.
It's been my experience with the
Utah 1088, SPANK, and impending
Iron Butt Rally is that you get a menu of bonus destinations to ride too. It's a smorgasbord that is impossible to eat everything without becoming very, very sick and/or being hauled away in a 4 wheeled vehicle with lights and siren of some sort. The trick is planning a route of which of the bonii (plural for bonus) builds the collection of highest points AND then executing that plan.
Mileage itself isn't a factor. In fact, sometimes more mileage to get points will yield less of an "efficiency bonus" in some rallies like the Cal 24.
In the SPANK rally last year there was a six hour session that the rally master mockingly told riders to "get ready to ride your wheels off" and whoever gets the most points per mile for that six hours would then get massive bonus points. A fair chunk of the field figured out the logic of this and my solution was to gas up, ride 10 miles to a single bonus and spend the afternoon checking out a Navajo ruin, ride 10 miles back and park the bike for 4 hours and try and take a nap. Gassed up after the 6 hours and got like 500 points per mile. I got more points for NOT riding than riding.
It ended up being a case of figuring out the puzzle the rally master had built.
If it ends up being about raw mileage....it ceases being a rally and becomes that other 'r' word that is four letters long. I would doubt it's anything about that.
These rallies have also involved either answering a certain question only answerable at the bonus, taking a picture of a provided rally flag, picking up some piece of evidence at the bonus (like a business card), or something clever to combine with your mileage log to prove you were you claimed.
I suggest reading the stories of riders at the Utah 1088 and reading through a bonus pack at the IBR site.
I think my best advice for a first rally is to enjoy it first because the experience ends up making a whole lot more sense on the ride home and following days. I set some simple goals in a certain order.
1) Finish.
2) Finish safely.
3) Finish without a ticket.
and if I did all those then icing on the cake was
4) Finish well.