In July my boyfriend and I will be in Wyoming scouting an area for hunting in September. So we'll be making this trip twice. We're about 90% sure there's no water resource. We will have a base camp and be hiking up a ridge and staying 2-3 nights up there (which is where there's no water). So my question is, how much water would you take with you? The hike up will be about 4-5 miles and fairly difficult, but once up there we shouldn't be putting on more than a couple of miles a day. We'll need water to drink (obviously), cook dinner for 2 for 2 nights, brush teeth, and wash face. It will probably end up being 3 days and 2 nights at a time.
Also, come September our load will be heavier, because my boyfriend will have his 12lb rifle with scope and bullets. I will be carrying the food for us both, our tent, and the majority of water to compensate for all of his heavy hunting gizmo's. We will hopefully have killed a mule deer as well, which may entail more hiking, packing it to where we're camped, and then down to the base camp. So that will add about another 100lb-125lb divided between the two of us on the trip out. Also, in September, we'll be taking more breaks to glass areas with our binoculars to look for deer.
I have read the average backpacker/hiker drinks 2-3 liters a day. Maybe it's just me, but there's noway I drink that much, even on steep ground with big time elevation gain. My boyfriend drinks more than I do. I'd say almost 2 if not 3 times more while hiking up hill. As for me, I don't get my 8 glasses of water a day, more like 4.
1 liter of water weighs about 2.2 lb. I've weighed my entire pack of gear pretty much down to the ounce and so far for a 2 night, 3 day trek I'm at 23.4 lbs. (That's including my 4.9lb of camera gear.) My goal was to stay under 30lb., so I'd be under 80lb on the way down (I only weigh 115lb). So 4L of water would put me at about 32.2 lbs and my boyfriend could take a 2L or 3L bladder. Do you think 7L of water would be enough? First my boyfriend thought 5L was too much, now he says it's not enough. He doesn't do much backpacking and I've always had water recourses, so I'm coming to the experts.
We did a similar trip in the Bitterroot Wilderness area in Idaho last November for 10 days. We hiked from base camp everyday doing a mostly uphill 4-5 mile hike a day with about 15lbs. I drank about 3 20 oz bottles of water/Gatorade in 24 hours and he probably had 4.5 or 5. We drank more the day the deer were killed/packed. That ground was steep, but WY will be a tad harder yet.

