Nantes to Belguim

Hello fellows,

My name is Alex and I am in Europe for an Euro trip in Bicycle.

I have done Paris-Orleans-Tours-Angers and now I am in Vannes.

I am going back to Nantes to get my stuff and then move on to the North and I would like to know which are the best roads to do such a trip.

If anyone can help me and/or give me some advice or a place to stay for the night during the travel I would be so glad.

Thanks in advance guys and take care.

ALX