2018 will be the first time that we are offering this tour as an exclusive for solo travellers. We have however run this exact itinerary for many years. There is a good selection of reviews for it here https://mark.reevoo.com/reevoomark/en-GB/product?sku=VN&tab=reviews&trkref=RVR
The group size is expected to be around 30
I hope that helps?