Yeah, you won't be able to have just one cresite forever. XD
Your setup looks nice, similar to mine.
I have an exo-terra cage for my adult male and use Reptibark with him. I've had him for 5 years, no issue with the bark.
We use paper towels for our female though and I'll probably use that for my next ones too.
Boga was my only gecko for 4 years, then last January on the 22nd at the reptile expo(after I had gotten a beardie in August and another beardie, just on New Year's Day) my sister got a crested gecko. XD Just this last August I got a snake and already want to get two more cresties.
I'm officially addicted. I need another new reptile. XD
Enjoy your buddie though! And your setup looks perfectly fine to me.