Do you think the extra add ons will be put onto disk for us to buy or do we have no choice but to go through steam? - Its just I have had a bad experience of paying for downloads and vowed never to do it again.
The first four DLC for FO3 were released in two-DLC DVD packs, I'm not sure if Bethesda has said they're considering this for FONV as well.
Bethesda does have a history of releasing GOTY editions with all of the major DLC included so if you really want to avoid digital downloads perhaps you could wait for a GOTY edition.
I really hope they will. It's pretty tempting to just buy them on steam, but I think I'll hold out for a DVD release. Hopefully we can get some official word on it at some point.