I tried a few backpacks / rucksacks but was never happy because of my bad back. This one for £ 27 from ebay works for me!!
https://www.flickr.com/gp/76315413@N08/Jo3qX1
Trying to actually show photos from Flickr aaarrgghhh
https://www.flickr.com/gp/76315413@N08/La84w5
https://www.flickr.com/gp/76315413@N08/Jo3qX1
Trying to actually show photos from Flickr aaarrgghhh
https://www.flickr.com/gp/76315413@N08/La84w5