Suggestions for long distance riding regarding bike set up? well your bike should already be set up for that. You have been riding it. Regarding what to bring. Use a piece of paper and figure out what you want to do. Write down the activities. Then write down what you need for those activities.
Activites: Hang with dad. Bring camera.
Ride with Dad. bring cold weather gear.
Take some side roads. Bring maps.
Clothes? Take one pr of jeans. You'll be wearing the other pair. You will never even wear the spare pair, except if you get wet riding through rain. Your parents have a washing machine. Use it. Therefore a change of clothes would be one pr of undies socks shirt. The cold weather gear will take up a lot of room.
So, take a change of clothes a cell phone some water and nutrition bars. Carry whiskey. Then ride. The challenge is being in the saddle, not making sure you pack everything you may need. Wally world can help you with what you forget. The difference between this ride to SLC and your tooling around town is 'tomorrow'. Thus you need to bring rain gear. Rx glasses. Toiletries. Don't pack a weeks worth of clothes. Don't plan on camping this trip. Although you will be riding through some spectacular areas.
The way I see it you will have two full saddle bags and a mile wide grin.