When we went, we were by ourselves. I hired Yhony to be our tour guide and take us around for the full day. I guess we are a little different in that we like to tour alone and not with a big crowd of people.
Regarding tipping...I'm not sure. My husband took care of paying the bill but we are usually pretty big tippers.
Especially if we had a good time and we DID!
I have read some other reviews regarding the guys that work for Yhony and they were very positive! So you can't go wrong with cavetubing.com! They will take good care of you! Have fun!