The landscape around Arthurs Pass is shaped by the two major rivers: the Waimakariri, which flows east, and the Taramakau flowing west. This leaves the big spine of mountains between the two major valleys, Mount Rolleston in the west, to Tainui Peak in the east, and a whole lot of tributaries flowing either north or south.
Trampers have somewhat of a problem: it’s not so easy to conjure up a circuit, there’s not so many easy passes to get from one valley to the next, there’s plenty who ended up scooting up one valley and then retreating, particularly in the cooler months when snow and/or avalanches are common.
The huts are generally good.
Be warned that due to the proximity to Christchurch in the summer months more accessible huts fill up. Take your chances, or take a tent.
Many of the smaller, older style, ie, falling down bivvies have been removed in recent times. There’s also two spots where accommodation is missing: there’s no hut at all towards the bottom of the Deception River, and it would be useful to have a proper hut near Minchin Pass to help with the creation of a decent circuit, but I guess that would also require a better route to be found up from the Taramakau.