Here's some tips for if you wish to do it again...my first time ever using FF was on 54 meat birds and I didn't seem to have the same struggles you did, though my coop was also a fair distance from the house (100 yds). Think ergonomics. Though I couldn't relocate my water and it had to be carried each day to the site, the feed didn't.....I located my feed cans next to the coop so my chores were less effort and more streamlined. I managed to feed 54 meat birds out of one bucket, feeding once per evening and replenishing the bucket right afterwards....by the next evening the feed was fully fermented.
Carrying a full 5 gal. bucket of wet feed to the coop just doesn't make any sense....carrying the water, yes, if you have to, but there's still ways around that....5 gal. buckets with lids tied to a dolly, in a garden cart behind the mower, in the back of the truck, collect rainwater at the coop, etc. Work smarter, not harder, and I think your next experience will be different....the only thing changed from feeding dry is the addition of water. That's it. If you can get the water to the coop, the rest is pretty much the same if you store your dry feed where it's handy for mixing at the feeding site.
Mix it drier if you want less messy poops, as was suggested. As for any spilled or slopped feed....if you have real meaties, I don't think that would be an issue...they eat everything, so clean up is not an issue.
Putting in the water before the feed and noting the ratios when you hit it right will give you a better mixing experience....once you know how much your particular feed can absorb, you know exactly how much water to use to get the right consistency....just takes noticing and playing with it first and then find your formula. My current feed is layer mash and it takes exactly one bucket of water to one bucket of feed to get my chosen consistency, but if I use a more fine ground feed like chick starter, that all changes a little, so one just has to know their feed.
As for stink...well...that's just meaties for you. Using deep litter, huge ventilation and free ranging can help it and feeding FF also helps it, but if you don't keep up with the deep litter, don't have really good ventilation or have too high a stocking rate for your land or pens, there will always be a measure of stink with meaties...their feed goes through them too quickly to digest fully due to their high metabolism.
Terrific post.
BTW, I never did smell chicken-poop that smelled like Chanel #5, or even close. LOL