Ah yes, but that depends on which bus you mean and to where!

For all public transport enquires this site is useful:

travel line website

As for the last special Festival bus, pretty late, ask the organisers....

If you mean the special (unofficial) bus to Salcombe Regis campsite and other campsites I believe there is some info somewhere on my website as well as on old threads on here. Problem is finding it.... I'll ask Google, she knows everything.

Here you are: (scroll down the page to section 3)

now fancy that - helpful information on buses.