I think the cammo version would be ideal for the allotments rather than my shoulder bag, I could hide amongst the plants and take enough survival supplies in case I got lost
The Kombat Viking Patrol Pack is made from 600D Tac-Poly and has a padded back with air flow channels for optimum comfort. This is the ultimate high capacity recon pack. 3-Day assault pack Molle webbing attachments located on exterior pouches Radio and aqua bladder compartments Frontal medical...
www.ebay.co.uk
60l of camera equipment is a seriously heavy load to carry, my Lowepro I use for "walking" is 16l if I use the longest dimensions (I think it was sold as 20l) , and fits in a G9 with a 14-140, a 100-400 lens, a 7-14 lens, a 12-60 lens, a 20mm prime, a 9mm pancake lens, a TZ60 compact, flash, filters, remote shutter release, laser sports sight, 4 spare batteries for each camera, spare SD cards, cloths, cleaning kit, rain cover in the base, dedicated tripod attachment. All up about 5kg, about 35cm top to bottom, add another 10cm for the tripod lower pocket.
This is my favourite, which I can manage OK, even in a bus or train, I'm going to be very interested how yours works out, and what you put in it, as I lke most are looking for the perfect solution