I might be there in April. (as my trip plans change constantly ).
I will ride down to the Ardèche at easter. I´ll take the route du soleil, down the Rhone valley.
It´ll be a bit chilly in the Rhine Valley and the Jura (as always when I pass there

But if you are beyond Besancon, the weater will get more and mor pleasant.
In the Provence you take a left turn until Genova, the ferry will take two nights.
From Tangier take the R road to Chefchaouen [tschauwenn].
Take a break, you´ll arrive there at around 1600 o´clock.
If you like a nice 420 friendly hostel run by a scotch guy with his wife and son (who is a hell of a help with everything), book two nights at Daar Scotlandee.
It´s not easy to find, but it´s worth searching.
In Marocco you´ll almost always find a place with acceptable weather.
And this year you can´t forecast anyway, bc. of the El Nino.
You can reach almost all destinations on Tarmac, but sometimes there is roadwork in progress, and the detour is worth a hard cross circuit


Good luck and I wish you a good time!