In the future, please don't make multi-book question threads like this, even if there's a meta-linkage to them all (e.g. "bombing"). It's much easier to deal with things if each is placed in its own appropriate subforum.
1) LAMs only.
2) Airships can't bomb.
3) Any aircraft can use them provided they meet the appropriate engine and environmental sealing to be able to operate in hostile atmospheres as well.
4) Yes, and for Recon Cameras they can be used per p. 150 of TO:AUE.
5) Yes, as per answer 3 above.