No
For the cave tour they have a ticket booth you can buy them at. Depending on how busy they are, will determine how fast you join a tour. However they run tours pretty frequently so you don't usually wait long.
Is this tour handicap accessible
Nope! You buy them there
Tickets are available at the Caverns. Tours leave at staggered times.
No you buy them there and they will tell you when the next tour leaves
Thanks! Your answer is awaiting moderation.