Hello Fray

To answer your qestions

Yes,they are in theory for most of the country, but most of the North still remains off limits.Short tours out of Agadez seem possible,but might be expensive and restricted to certain areas.

No.Only aid workers.One or two agencies have re-opened, but I imagine business is somewhat slow if non existent.

Nearly all the areas you listed above are off limits as far as I am aware.I asked for info on camel trip to Bilma but was told that it was not possible.Im sure you could find a guide who may be willing to take you un-offically,but you are taking a huge risk,you will most likely not have any security (sitting duck) and you presence will be noticed in Agadez so you may not be able to get out onto the piste without being stopped by police or army.

I can't answer that as I did not get it.The aid agency did,but as far as I am aware it think it was not too much hassle.We visted many prefectures en-route and all seemed very laidback and glad to see foreigners.

Yes,fairly lax.Not many chekpoints or police,roads seem to be in good condition.travel in this area seems very possible.Perhaps register intent with police in Niamey and see where they will give you permission to go.

No problem.