when out hiking, I generally keep passport and ticket(s) in a small waterproof map case. I carry phone as normal (in a pocket). Any cards I keep in small credit card holder in trouser pocket (as normal). The only difference is that I will have a secondary bank/debit card stored in rucksack.
When driving abroad or non-hiking, I will use a small branded neck/shoulder bag, big enough to carry passport, driver's licence and car keys when not driving. And keep a back-up bank card and phone in glove box with vehicle documents. If not wearing trousers, I usually still have at least two pockets in shorts for phone and bank cards.
Worst experience I've had abroad, a friend lost his only bank card in Northern Italy. Didn't lose anything else, save his bank card! I initially loaned him 500 euros, thinking this would be enough. after ten days I was owed 2200 euros. And I even hired him a moped. Upon returning to the UK, it took 3 months to repay the money. And we fell out over currency rates and charges to my account. His refusal to have money wired to him was odd, to say the least. I will hazard a guess any money that would have been sent would have been a fraction of his total spending. And nine times out of ten, I paid for food and drinks. My friend's so-called losing of his bank card ended up costing me.