I was thinking of the weight of coins, 'cos you were counting grams when discussing benefits of stoves, so I wondered if you had a method of cutting down on coin weight, but I suppose you are going to get loads of change given to you if you take fivers. You could take some books of postage stamps to use as change.,some people will take unused stamps, in lieu of cash..........Or you could borrow one of my Shetland ponies, say Sausage, to be your 'pack pony', then you could take all your money in two-pence-pieces......
Poe