In reply to alex.serban:
Hi Alex,
We were there last in 2018, so a few years now and before that 2014.
It is very easy to organise everything yourself, from the airport taxi to bus company Cruz del Sur, others are available, bus to Huaraz. Timetables are available online.
Huaraz has accommodation that can be booked via booking.com.
Loads of agencies in town that will organise private transfers to trail heads and donkeys. Plus more such as cooks/base camp tents, if that's what your after.
It probably can all be pre arranged from airport pick up but it's pretty easy.
If you have any other questions I can try and answer.
Cheers, Rob