Is it worthwhile taking a solar charger or is there sufficient option for recharging bike computer, cell phones, GoPro, etc at the overnights?

Hi. I need to pack my ice cream tubs this week and now things are getting real!!! Please give your recommendation of what has worked for you - and optional extras e.g. I just came off a week on the Amatola trail and my nightly little sachet of Amarula was a winner, as were nuts, droe wors and a snicker bar. While in general life I avoid sugar - I have found over the years on strenuous events like IM or Joberg2C that I need my regular Gu's - especially as I struggle to eat real food - even half a baby potato is a push. That's at race pace and high intensity, though. I'm planning 21 days - so most days have an interim "lunch" stop, right? Any advice appreciated.

Obviously no GPS tracking - but I see that a couple of watch examples are given as suitable. Are watches more suitable than handlebar mounted due to the map board? Anything I should look out for?

It seems that taking rest days isn’t common, even amongst the 21+ day tourers. I know it’s a “race” but isn’t there more chance of finishing by taking at least 1 rest day per week? or am I missing something?

I really don't want to deal with the winter cold, so am keen to do a summer RASA. What are the pros and cons of each?