The answer to all your questions is that you'll find out what works for you. But as I'm stuck at home with nothing better to do, I'll answer what I've found works for me,
Packing - For clothes, I use two stuff sacks, clean and dirty, the clean goes in the pannier with the bedding and sleep stuff, I'm not too bothered where the other goes, wherever it'll fit, until I get round to laundering it, I don't need it anywhere. I suppose netting sacks might work, but there's not much weight to be saved and my clean clothing one doubles up as a pillow.
Split between panniers - as above, only one of them needs to come into the inner tent. The other can stay in the porch.
Organisation, I pack up what can be before going to bed, just as importantly I haven't unpacked what I haven't needed. That comes from routine, knowing where what you need will be.
I prefer a small bar bag, there's only the essentials in it, camera, phone, wallet, keys, plus powerpack if in use. If I need more capacity I'll add it elsewhere, stem bag, top tube...
Shoes I can't help with, I never had a problem with MTB SPD's and now find big flat pinned pedals and grippy shoes even more comfortable.
Bike cleaning
Did you go for a chain or belt? I do the minimum of chain cleaning, same as at home, wipe, oil, leave overnight, wipe off. The rest of the bike, if it's really dirty might get taken to the campsite tap and wiped down with a J-Cloth. But that doesn't happen often.
Jetwash - This can be controversial, use with caution, don't point it anywhere near a bearing, wash the bike along it's centreline rather than across it, and IMO it's fine, it's never caused me an issue, often a quid well pent at the garage opposite me.
More importantly, minimise how dirty it gets, do you have mudguards? How about mudflaps? Not always practical I know, but it's sometimes comical to see riders with and without at the end of the same ride.
Did I mention J-Cloths, these would be my desert Island luxury. Use after a shower to get 90% dry before using your towel, do the washing up, wipe the dew of the tent before packing away, clean the chain and bike, a single cloth can be used for multiple tasks, in the right order obviously
Wine gums - no idea! I like dried apricots.
If I had a top tip, it would be to sort the bike out ASAP when you arrive each day, I do this as soon as the tent is up, before getting cleaned and changed or eating. Whatever you've been thinking needs doing as you ride along, which may be nothing, do it now, while you remember, it it turns out to ba a bigger job, you have time to sort it, then put the bike away and know it's ready to ride.