I spent about 6 weeks on the ride in 2014. A solo trip, selfishly planned as a treat following retirement.
On a few nights I used the warmshowers app, on a few I camped but the majority of night stops were through Booking.com. I would call/mail ahead based on how far I thought my leisurely progress would allow and check that they could provide somewhere safe for the bike. I would charge the battery in the room.
I would do it again in a shot but am not sure that my wife would be quite so supportive. I am older and not as fit following a heart problem so it might be considered a tad irresponsible for me.
I followed the route called the Velodyssee and kept a blog: here it is: www. e-rider.eu
a great experience which I commend to anyone!