The military water cans have an optional spigot. Those water jugs are relatively expensive, but they are super easy to fill up, easy to carry, come in 3 or 5 gallon sizes, and are remarkably durable. Hauling water is a lot of work and sometimes is difficult to acquire. Since water is so important, I opted to spend the extra $ on the military style water jugs. Rotopax is another option. Someone on here posted a pic of the Rotopax they use. Man, was I impressed. Looked great and highly functional. Kinda spendy again, but having potable water that doesn't leak is worth it. Non-potable water can ruin your day to say the least as can a leak from a 5 gallon jug- now that is one heck of a mess when it is spread out over 2 millimeters and allowed to rot out your wood, rust your frame, and/or defeat your insulation.
Regarding the pressure sprayers, there are a few things to consider. Smell inside first. If it has a chemical smell, that smell will never go away no matter what it is cleaned with. Then the smell will get in your hair. Gross. It must pass the sniff test. Next, is it durable? Some of them are so weak and flimsy that I feel that the handle will snap off just tightening it! No exaggeration. They flex like crazy even with my skinny, little, girl arms (I'm a dude, but have small arms. Lol). Get one built stout enough. Some have small, narrow pumps (the round thing that slides inside the vessel) with a few having larger pumps. Unless you like pumping, get a larger diameter pump. When releasing pressure, some don't have a separate release valve and the lid must be unscrewed to release pressure. That's OK as long as the lid covers the spray, directing it away from your face. The lid should be an umbrella-shape for that reason. One last thing, find one that has a "bowl" surrounding the opening in the top where the lid/pump screws in. This helps keep water from spilling and makes filling up easier and less messy. All of these features will cost you $10 to $15 more and is well worth it. When all of these features are in one sprayer, it likely will be built to a higher quality as well.
Optionally, switch out the 3/8" hose with 1/4" hose if it doesn't have the 1/4" size if you will ever heat up water then pour it in instead of leaving it out in the sun to warm up. The smaller hose will have a much smaller impact when it cools the water down for those first several inches of cold hose. I don't like that first cold blast when I shower, so minimizing that is important.
One last thing. Size. 1 gallon? 2 1/2 gallons? I opted for a 2 gallon (or maybe it was 2 1/2 gallon). The one gallon worked fine, but I had to bend over farther to pump it up compared to the taller, 2 1/2 gallon one. When I pumping it up everyday, having that extra height makes life a tad more comfy. While the amount of water stayed the same, the amount of air needed to store pressure was greatly increased. With the 1 gallon size, I had to stop in the middle of my shower to give it a couple of extra pumps to maintain the pressure that I like. With the 2 1/2 gallon sprayer, 35 pumps is all it takes. 10 seconds of pumping and I have highly consistent pressure; again, making my daily routine easier.
