One of my friends and I took a 2 hour trip (each way) one day to Cherokee Pass, MO to Dog 'n' Suds. We ate enough food for 2 meals. The girl wanted to know where we were putting it all. I told her the I haven't had Dog 'n' Suds since the 70's so I had to make up for lost time. It was very good, just like I remembered. I took root beer home but it was kind of flat from the car ride I think.
I buy Dog 'n' Suds root beer in 32 oz. bottles from a local store sometimes. It is very good. I think it is bottled in Chicago by Clover Club Bottling Company. It probably isn't exactly the same as when you buy it at the drive in, but it is the best bottled root beer there is.