The Camargue

If you Google Camargue, you should get some results that would be helpful. Personally, I would rent a car for the day. I've been there twice by car and there is a lot to see. Renting a car would probably be less expensive than a tour. It is an easy day trip from Arles.

In addition to picking up a car in Arles, Rick's Provence & Riviera guidebook describes the option of taking bus #20 from Arles train or bus station to Stes-Maries-de-la-Mer, a Camargue town where you can connect with excursions by jeep or horseback, or bikes to rent.

We had a car, but I did notice bus stops along the way. I understand the bus is very cheap. Based on the outrageous traffic we hit going back into Arles, I think the bus would be preferable to renting a car.

There is an interesting wildlife sanctuary which I would expect to have a stop.

Saintes-Maries-de-la-Mer is a cute little beach town. The ride between Arles and it is enjoyable with views of the famous cattle and horses.

I think it is well worth the trip.

I never forget the afternoon my travel companion and I entered a bar in Saintes-Maries-de-la-Mer. We swung open the door and just like in the movies, the bar went silent for a second or two and all eyes were on us - it felt like the wild west.

I love the Carmague... have been a few times but always with a car, but looks like the bus will work.
I was with a bunch of photographers and of course we wanted to see the flamingos and wild horses. First trip we saw lots of flamingos and no horses. Second trip we searched for hours and saw two flamingos, but we did see the 'wild' white horses. Supposedly the term 'wild horse' in the Carmague simply means they do not sleep in the barn at night. They were still in fenced areas and not galloping about the countryside amidst the pink flamingos... as I had envisioned! Oh well, it was still great.

Thank you all for your suggestions! I really appreciate your help!