Matt,
I used to live and work in Huaraz. I've been to the most valleys in the Blanca on the West Side and a few on the East side and I've done 6 trips to the Huayhuash.
First off you will have a fantastic trip, but it will be even better if you can budget 3 weeks. That will allow an extra margin of error for sickness or travel delays. I would also concentrate on only one area of Peru at a time. Focus on the Blanca/Huayhuash region this trip. Do a Cuzco/Machu Pichu trip another time, a jungle/Iquitios/ another year, a beach surfing trip during their summer one year. Peru is a big and vary varied country. Trying to do too much in one trip will just lead to frustration.
Plan at least a day or two in Lima on the way out to enjoy the fabulous food to be had there. Ceviche for lunch is tradition and excellent, not to be missed. The Peruvian Japanese community is very unique and because of the great sources of seafood, some excellent Japanese food can be had in Lima.
Best breakfast, coffee and views in Huaraz: Cafe Andino
The owner can help set up some logistics (Transport, Gear, Arrieros, Guide, cooks ect…) He also sells maps to both the Blanca and Huayhuash. Best to contact them ahead of time as they get busy this time of year. The Benways are some of the most reliable logistic suppliers in town and can hook you up with other reliable operators if they are too busy. There are many fly by night scammers in Huaraz. You can easily waste time and money if not careful.
I published a 1:50,000 trekking map to the Huahuash in the early 2000's it might still be available in Huaraz. The DOAV maps ( 2 sheets for the Blanca and 1 sheet for Huayhuash) are newer and better IMHO as a mountain cartographer. Plan to get those before leaving, they can be hard to find in Peru. Sometimes the SAEC stocks them. Other locally made maps are also available. Standfords (http://travel.stanfords.co.uk/maps/Cordillera%20Huayhuash%20Map)can ship to the US, Omni maps also might have stock. They may have more recently updated roads and trails for the Huayhuash. Mining and road building has changed the length of the circuit a lot in the last 10 years. Each year seems to be different.
Gaz canisters are readily available. So is White Gaz (Bencina Blanca)
A good acclimatization scenario is like this:
Day 1. Hike up to the cross above Huaraz. Go as a group and take no valuables;
Day 2. If feeling well, hike up to Laguna Churup. You can arrange a cab to take you part of the way up to the end of the road and wait for you to hike down.
Then think about starting to plan a longer trip. Take at least 3 days to acclimatize in Huaraz before heading out on a long trek and only leave if feeling 100%. If you leave for a trek sick, you will get worst at altitude, almost guaranteed.
If you are fit and strong and acclimatized well, you can do Rurec to Chavin in one day and see the spectacular ruins at Chavin.
If you have more time to trek in the Blanca, the Los Cedros trek is less crowded than the Santa Cruz trek which can be a zoo in July and August. You can also do a quick overnight to Laguna 69 if time is more limited. A spectacular place to camp for a night.
If going with pack animals bring the warmest sleeping bag and comfiest sleeping pad you own. Bring a big tent and a pyramid shelter to eat , cook and hangout in. You will appreciate it. The burros will carry it. The Huayhuash can be rainier than the Blanca, plan for rain even in the dry season. If you are self supported go as light and warm as you can tolerate, but nights can be cold, kind of like late Sept in the mountains of the lower 48. All above treeline in the alpine and cold air coming off the glaciers, so can be cold at night, plan for at least low 20's. Hard to find sheltered camping spots at times. The Huayhuash has big passes to cross each and everyday. It's like the JMT in that way, but at higher elevation.
Be prepared to pay community fees. These have apparently been standardized. I'm out of the loop now but check in town with the Benways at Cafe Andino.


