Stayed for 3 nights as a base for visiting London. Friendly helpful wardens and excellent clean facilities and grounds. The suggested train/riverboat cruise from Greenwich was a great idea and Greenwich was a lovely place to visit -less hectic than the city! Train station within a 5-6 minute walk and then a pleasant 30min journey into Charing Cross. After much research (Oyster/Travel pass etc) we chose contactless payment for train transport ; a daily adult return with no concessions was only £5.40. Perhaps if you are visiting paid attractions then a travel card would get you '2 for 1 deals' but as we weren't I  recommend the contactless route. A great site with a warm welcome.