The closest camping is 50 meters from the entrance of Vatican City, is the Camping Rosmarina. Inside the club there is a ban on the camp for safety reasons and then fire tents, campers, vans equipped with beds and in all manners can stay at Camping Rosmarina.
Camping closer with Bungalow: The Camping Cuttings, Camping Il Sole.
The closest hotels are: Hotel Rosmarina, Hotel Ariston. A little further away the Hotel Leopold II of Lorraine.
Residence: Hotel Residence Rose of Neptune Residence Mediterranean Residence Tombolo
A more complete list of the structures can be seen here: http://www.eventivelamaremma.it/it/alloggi-e-servizi/ and also here: http://www.turismogrosseto.it/