I use to live in that area thirty years ago. From April to October, one of the most beautiful places to ride I've seen (but in January...yikes...).
The population of Ottawa County has doubled since I was there. At that time, there were two lane paved roads where folks were driving at 40 mph to 60 mph. Too fast for cyclists to enjoy a car or truck buzzing two feet past your left shoulder.
And, there were lots of smaller back roads that were just dirt and gravel. Those were ideal for slow, peaceful riding. But, the population boom may mean finding such quiet roads will be difficult. Some stores used to sell Ottawa County road maps with those back roads marked. They are not on the "official" Michigan highway map.
Enjoy your time in West Michigan. This is a great time of year to be there.