Good afternoon,
we are 4 people and we are interested on the 4th of May to do the Siq trail in Mujib Biosphere. 
I saw online that a guide is not nessasary for this activity but i coudnt see the option to book/reserve a spot since there is a limit of people entering. 
Could you help me? Is it possible to reserve or is it first come first served? 

P.S Till what time is the canyon open? 

Thank you in advance,
Nota