@GreenAndSpringy I'm the OP.
I posted this several moths ago. Since then, DD has recently completed her Bronze award.
However, our experience is exactly as you fear - this was too much of a burden and too stressful.
Not so much the actual 'doing stuff' but all the 'arranging' and the 'admin'. There was much having to sweep in and help DD with the latter. In one word, the online system is overwhelm-inducing (both for DD and me - your situation sounds similar to me).
Also, the 'reasonable adaptations' by school were useless. She did get to the expedition with her chosen friends, but that's it. The volunteering specifically was an issue - she did hers in school helping younger students. This in itself was challenge for DD (social issues) but I thoght, great, that's part of the experience. However, DD needed a bit of support with this and none was offered. Not only that, it ended up being detrimental to her confidence -
To cut a long story short, the activity was interrupted because of said lack of support, which left DD thinking she had done something wrong (she did not). I had to point out to the coordinator that the promised support had not materialised and they had not even given any thought to the fact that she needed it (the expected an ASD child with communication issues to communicate that she needed help 🙄). Not only that but she had to restart a new activity, wich again was difficult to come by and arrange.
Plus all the admin later. I don't think may 14-15 year olds are capable of dealing with the emailing, arranging, sending contact details and reports back and forth, ASD or not. So just imagine what it was like for DD - and me.
Sorry this is long, I thought it would be helpful for you and your DD. Good luck whatever you decide.