The North Ridge of Artesonraju is the prominent well known ridge often depicted on photos of the mountain.
It is generally agreed upon that the route is now a D+. (Yay global warming!) Most of the climbing is in the AI3 range, with a lot of vertical meters to cover. The route is often simulclimbed, as pitching it out would probably increase the required time by 5+ hours. If you were to actually pitch this route out, it would probably be along the line of 15+ pitches. There are also a couple sporty ice moves (AI4ish) higher up on the route, but nothing too crazy. The last bit to gain the summit ridge is a very brittle snow bridge with a lot of exposure, this seems to be where most parties stop - it is for this section that I give the route an 'R'.
Most locals seem to refer to this route as the "North Face". Take beta with a grain of salt, we got a lot of "it's impossible" feedback in Huaraz and at BC. We heard everything - chest deep snow for 200m, a huge crevasse at the summit, a ridiculously corniced ridge, and a 50m deep crack in the ridge.
There are a few spots for tents at Morrain Camp. Generally there aren't many folks up there, if any. However, if there is a commercial expedition (I know of only 1), they may sit on all the spots for quite a few days. We had to dig out a new spot for ourselves to make room. The hike from BC to MC is kind of a pain, stay on the prominent ridges, it's easy to waste energy following the cow trails below. I've heard that you can pay a couple hundred bucks for a porter to take your backpack up as well. (I have no idea where you would find a porter, but BC if full of trekking parties and you can probably ask around there. A few hundred dollars sounded expensive for the area to me, so if you actually want to do this I'd start bidding at a much lower price.)
Double 60-70m ropes, 6-8 pickets if they are not already placed, ice screws, typical Cordillera Blanca technical gear.
2017 Summit Trip Report https://gethighonaltitude.com/2017/07/14/artesonraju-north-ridge/