A couple weeks ago I bought us two sets of TrailMax five bag luggage sets for our horses. Got 'em thru Cabela's, not that it matters. I'm pretty impressed with them--but haven't actually put them on the horses, yet.
I loaded up one saddle bag with my camp kitchen today, just to see how everything would fit. It fits fine! Stove, nesting cook kit, coffee cups (need to add a couple more), and my coffee fixing stuff (the important stuff!). I think there's still room for plates/bowls and utensiles. All in one bag.
That leaves the other saddle bag for all the food and water--at least 3 liters of water, maybe more--and the water filter.
The cantle bag is plenty big enough for sleeping bag and clothes or tent and clothes. I'll have to attach either the sleeping bag or tent behind the cantle bag, I think.
Which leaves the rather spacious pommel bags, and a couple of the bags on the Mrs. Horse, for the rest of the stuff, not that there's much left!
My goal is for the Mrs. And I to go on two night camping rides without any need for a pack animal (which we don't have and can't haul in our trailer, anyway). I think we could pack this luggage for a week long ride with no problem, but I just don't see us doing that.
Of course, it's all a pencil exercise for the next five or six months. Sigh.