In reply to arch the parch:
Hi Archie
I applied for the permit in Mendoza - there is an office where you take your passport, cash and some other things (please check) and took about an hour. While they were processing it (used to be about a week or so) I went to Vallecitos for some acclimatisation (about a week) where you can get to around 6000m if you choose - it meant we could move fast on Aconcagua with no altitude sickness. When we returned we picked up the permits and took the bus out to Punta de Vacas. We didnt use mules (carrying over 50kg in backpacks was hard work but it had its upsides... er, maybe not, but we still didnt use mules). By the sounds of other people's comments this may be an issue for you - but it wasn't a factor for me. Things might have changed but the Internet will update things for you.
We had planned for the Polish Direct route. But, in answer to your question, no, the weather wasnt great. We were stuck in a 5 day storm at over 6000m (storm struck within 10 mins of arriving at the high camp). I summited solo on the 6th day, my partner on the 8th day, so quite a long time up high. Took 2 weeks total and we had to skip the Direct and do the Traverse because of too much windslab from the storm (postholing to the hip on the Traverse!). If you want my itinerary etc, send me an email and I'll attach it, along with some other things.
If you let me know the details of what you are planning, I can share what I found with you.