Post em Rabat to Dakhla Western Sahara, Dakar, Senegal, The Gambia

Do you guys have gone to these countries? I am looking for inspiration for my trip. I plan to go with my husband there but still don't know best climatic time to go, or even what to do. We have in mind we want to see the Sea and jungles, eat fruits and handcraft markets, also get tailor made clothes on the go with your nice fabrics and buy condiments and play with kids and have a relaxed time interacting with locals. And yes we want to learn first steps of your dance and know musicians.... OK it sounds we will need more days...!

Any recommendations or advices too?

Which vaccinations are mandatory or advisable (traveller's may know)