The making of sherry including Manzanilla follow some basic principals so seeing a working bodega in Jerez should certainly whet your whistle as the saying goes. Some favour going down the well trodden path of taking the Tio Pepe Gonzales Byass tour but in some respects this is too easy. There are others that do offer tours and frankly you should be trying to visit a sherry house which you are familiar with. If you do not have any favourite tipple then look at the list of sherry bodegas on the Jerez tourism web site
which may not be totally complete or email them for an updated list.
I have visited a few of the bodegas in Jerez and certainly Tio Pepe and Sandemans offer tours which are good. One visit that I did make several years ago was to my favourite "brand" of sherry being Lustau. You could study this :
They sell a Manzanilla but for the true Manzanilla bodega you need to visit Sanlucar de Barrameda at the mouth of the Guadalquivir river where you find all the brands such as La Guita .
And don't forget the other corner of the sherry triangle being El Puerto de Santa Maria which is not so far to drive from Chiclana. The famous house Osborne is here with the winery bodega situated quite close to the quay and river not far from where the ferry goes across to Cadiz. The history of Osborne is very interesting and they do have a tour in English and small shop. http://www.osborne.es/en/