Hello northface
November is a good time for wet weather and a bad time for daylight, so whatever else you take, carry a headtorch! It all depends how many days you are planning to spend on the Way, but by November you can't count on more than 7 to 9 hours of daylight (just over 9 in early November, 7 and a half by month end). If you're carrying heavy loads and trying to complete the Way in 6 days or less in wet, windy conditions, you will certainly have a challenge on your hands

Good luck with it anyway. Which charity are you fund-raising for? Feel free to include a link.
There are bothies at Rowchoish and Doune (on the mid- and northern east shore of Loch Lomond respectively). Plenty of campsites (both free and commercial) are listed on page 13 of our
guidebook and you are also allowed to do wild camping.