I was about 8st in my DoE days and my rucksack 3st. 20 years ago, the gear was heavier and there weren't (certainly affordable) women's fit rucksacks etc. There wasn't cheap technical clothing so I was in sodden cotton, and bulky jumpers.
My first bag was 25l with all sorts hanging off it but at least it fitted my back! I then aquired a 65l bag which was hellish as the bag was far too long for my back so hung off the edge of my shoulders, and came down over my buttocks and bounced around for every. single. step. And by the 4 day drenchfest in the Lake District, that was a. lot. of. steps!
I remember on the Bronze practice that there were checks for people who looked ridiculously overloaded, and remember the confiscation of the hairdyer (no electricity on the camping field/ basic toilets), and the 2l bottle of concentrated squash 
I got so much out of the award, directly and indirectly. It motivated me to learn to swim and get my 25l badge at 16- to phone up the pool and organise adult lessons took a bit of mustering some confidence. The next stage was to get a Bronze swimming award, a massive leap from 25m... long before completing my Gold DoE Award, I got the Silver swimming award. That gave me the confidence to learn to ride a bike at 19. I joined a walking club at uni and made my best mates and met DH. I've got into Girl Guiding as an adult.
Having a very protective parent, being thrust into the deep end and left to get on with it was so valuable. Nothing other than my own legs was going to get me to where I needed to be and solve the problems along the way. There was a lot of blood, sweat and tears along the way (and some stitches and facial scaring
)
There were over 80 of us on the Bronze Practice. 8 people collected their Gold award at Buckingham Palace 5 years later. People tend to flounder on completing and signing off the other sections rather than the expedition.
Such fond memories... the only thing I'd tell my 15 year old self is that I have a nasty intolerance to soya mince and to keep well clear of it... 
I still plodded on though. Painfully. So painfully.