>>1
If it was made of fabrics or light materials yeah it would be possible (been too long since I've seen Tale Spin)
The only way helium tanks would work is if your airship is weak and fragile. Usually, with metal ships, the space you could fill up with helium could be put to much better use holding fuel or engines. Still, it would work if your ship was very light (and had a very high of helium -> passenger space ratio).
One thing that might help is to have vacuum chambers instead of helium chambers. Harder to make, but not explosive (although implosive) and they would work better.
A helicopter propeller can hold maybe 6-7 tons? If your airship is made of light materials like fabrics, those could add up if you had many. But If your airship is metal, propellers would only be able to take a fraction off of the total weight.