I have done 120 mile touring and it was over either 2 days or 3 days.
The easy estimate is 10 miles per hour for a bike ride. You can easily ride 50 miles in one day. With a distance of 169 miles, you should take around 4 days. Sometimes, the average speed is closer to 15 miles per hour. Also, you may take more or less time per day.
I used both front and rear panniers. Placed camping and clothing in the panniers. The sleeping bag on on the back rack (can be used as a soft seat too). Tools on the front rack or an easy access pouch on the panniers. Another option is a bag on top of the front rack.
You will need a pump and at least two small water bottle holders or at least one large bottle holders.
Be aware of wind, and sharp turns. Remember, you bike has more mass on it, so it will be a little trickier to mount and steer.
Head lights and taillights are a must, at least the taillight. You want those cars coming from behind to see you.
You may also want to bring a mobile phone and a charger. Nice to have in an emergency. Small first aid kit tool.
As far as snacks go, the usual trail mix will do. Helmets are mandatory. A wet rag between your head and the helmet would be nice too.
Also, either drive the route first or explore it with Google Maps. Look for hills and see if there are any flat routes around them. Also, look for bicycle paths or routes. These bicyle paths provide more isolation between you and those nasty cars (moving or the stationary ones that have opening doors). Beware of sewer grates, they tend to do wreak havoc with wheel rims.
I used high pressure tires on my bike: 90 in the front, 85 in the rear. High pressure makes less friction on the road and your pedaling easier. Also, adjust your seat so that your legs stretch out at the lowest pedal point. This reduces the possibility of getting cramped legs.
As a side note: A normal person walks at a rate of 2 miles per hour. If they walk for a total of 5 hours per day, they will average 10 miles per day. A bike is 10 mph, and you can cover 50 miles during 5 hours. You may want to rethink your duration a bit. Also, break up your travel into segments. Each segment should end at a hotel or camping spot regardless of the distance.