It's good that you are doing the right thing (except for the smoking part). I would use enough precaution to prevent the worst thing happening in case of all possible accidents, but other than that, dichromate is not particularly dangerous to have in small quantity. I would also concern about disposal of the used solution. Dichromate (a hexavalent chromium compound) is harmful to the environment if sent to municipal sewer system, or to the environment. Use local hazardous material collection program.