We arrive on Saturday and hopefully we will book the six day pass we are going to use Hunters ,when do we go to Hunters to get the skis and passes?
We will arrive in the afternoon on Saturday?
If you do arrive in Borovets before Hunters close on the Saturday, I'd go and book your stuff that day. Sunday mornings when the majority do it can be a right pain and you'll probably be hanging around for a couple of hours. If you have your gear sorted then you can miss the queues