Hello! I’ll be hiking in NZ for the first time (and in general) and am planning on hiking a few spots such as the Hooker Valley, Rob Roy and potentially Mt Aspiring or Mt John Summit Circuit. I believe most of these hikes are around 3-4hrs return so just wondering if a 15L or 20L is best suited for these hikes? I mentioned 5hrs in the title, just in case it does take me that long as a beginner or if I’m stopping every now and then. Thanks! #activity #hiking