What you put into your practise is what you will get out of it.
I have been on retreats where some of the yogis seem to think having a chitty chat about dive islands they have been to or or planning to go to are brilliant.Which country they are going to next,etc.
My advice is that no matter where you go to practise, put your heart into it.
The good thing about retreats is that you will(hopefully) have good teachers, who can guide you in your practise.This is invaluable, especially for newbies.Once you get past the early wake up call, and the not eating after midday stuff, if you practise according to your teachers instructions, results will begin to show.
And crawling on the planets face,some insects called the human race.
Lost in time
Lost in space