Using VVV for a North Holland bike trip

I’m taking a short 5-6 day bike trip doing a circuit of North Holland (Amsterdam-Alkmaar-Texel-Enhuizen-Amsterdam) at the beginning of September. I’ve never done this before and am so excited to explore your beautiful country by bicycle. Our bicycling guide suggests rolling into town, hitting the local VVV and booking accommodations from there. Is this really possible? Is there a chance there will be nowhere for us to stay? I’m American and we don’t have anything like VVV so I’m not sure what to expect. The possibility of being able to not make reservations ahead of time in case we run into problems or want to change our itinerary is tempting—but I don’t want to be stranded. Thanks in advance for your advice!

Edit: Thanks so much for all your helpful suggestions! I think we are going to book ahead of time and keep to our itinerary rain or shine. We’re really looking forward to our trip.