The only way to access these records seems to be by getting the South Tipperary Family History Centre to conduct very expensive searches of their archives.
I have had the problem at both North and South Tipperary Family History Centres. I really do not like that organisation
Basically these so called family history centres do block you from doing your own research and wish to sell you expensive researchers, and I would think that is where the original story arose. I have seen the books I want on their shelves and they refused to let me look at them
As long as you avoid these places, then you should be able to access most records (as long as you can find who has them, or as long as they exist).
It would probably save you a lot of leg work if you started with the fiches at the Nat Library of Ireland.
http://www.nli.ie/en/family-history-introduction.aspxwill get you started. They have a desk there specially to help you.
Get a parish map and make a list of the parishes you are interested in, then research online what years are available and where to read them.
Quite honestly it is no good turning up at a parish, as the records may not be there, or difficult to access as you have to track down whoever has them.
Having said all that, you will find most people very welcoming. I can recommend the Local History Centres in the Country Libraries - again research online to find where they are and when they are open. They do not have parish records but are excellent sources of books and papers and information at a local level