Unless you're in the outback, other places have shops,to top up with provisions, too!!
This is good advice and something I learnt a few years back, unless you're an impossible fussy ester you can get sorted pretty much everywhere. Same goes for bike spares and kit, even if it's just an emergency Wilkos stop.
Dependant on what style of tour you're doing I've learnt kit can be washed every couple of days, gym style shorts do away with the need for underwear, flip flops are light and dont need socks, most hotels/B&B's have complimentary shower gels.
Pans double up as bowls, sporks are usable, Trangia burners can be placed between rocks without the need for the full system.
Also used power banks in the past but these are often heavy and again, unless in the outback there is usually somewhere to charge your gadgets.
Also rely on hospitality, most people are pretty friendly and if you're in a really tight spot majority of people will happily help you out, even if its just refilling water from the garden tap.