Just wanting to finish isn't a bad approach to your first 100 miler.
Working up to two 4 to 6 hour trail rides a week is a good plan. Do very little the week before the race, but ride a bit. You really want a deep well of reserves heading into the race.
Eating what has always worked for you is an excellent plan. A 100 miler is not the place to try ANYTHING new (food, shoes, shorts, grips...........). But, if there is any racer in you, you'll probably end up pushing a bit harder than you think, so don't over do the slow digesting solid food.
You sound really fit, and you're at an excellent endurance age. I suspect you'll do well, and be back again to actually race a 100 miler.
Working up to two 4 to 6 hour trail rides a week is a good plan. Do very little the week before the race, but ride a bit. You really want a deep well of reserves heading into the race.
Eating what has always worked for you is an excellent plan. A 100 miler is not the place to try ANYTHING new (food, shoes, shorts, grips...........). But, if there is any racer in you, you'll probably end up pushing a bit harder than you think, so don't over do the slow digesting solid food.
You sound really fit, and you're at an excellent endurance age. I suspect you'll do well, and be back again to actually race a 100 miler.