Harrison’s Cave and Welchman Hall Gully by welchmanhallgully | Apr 30, 2015 | garden tour booknow posts | 0 comments Entrance fees into Harrison’s Cave and Welchman Hall Gully half day tour (approx. 4 hours). Transportation included (including pick-up and drop-off) Add $15US for a hot local lunch A minimium of 2 people per tour 2 to 7 people Adult $ 115 US Child $ 85 US 8 or more people Adult $ 80 US Child $ 70 US .