1. One digital camera ( or 2 if you can hide somewhere should not be a problem) whether it is as a gift or ...Depends upon time and persons. Some had no trouble while taking video camera and digital camera while some had. Sometime few bucks help. Honestly no good idea though. 2. Try to comply with health requirements while you are back here too. Do not knwo abt ohers. 4. Most of the time, you are not checked at Airport for money unless you are not a Nepali Citizen. Still advised not to take more than $10000.