[T.G]

If your cigars are properly humidified before being placed in the traveldor, under most conditions, they will be fine for weeks, if not months without adding any humidification to the box. If you must use a humidifier in a traveldor like that, keep in mind that the box does not breathe and is airtight, so ideally you want something that can both absorb and release moisture to avoid potential problems, using that credo is begging for mold or over humidification. 2-way Boveda packs or Heartfelt humidity sheets are ideal as they are flat and can slide in vertically or be placed above cigars and not reduce your capacity. Heartfelt and HCM beads would also work, although they might take up some space that could have been used to hold cigars.

As for the padded envelope, I wouldn't. Too much risk of damage. By the time you add in the cost of a DC number for 1st class mail, and taking the extra weight of the pipe into account, you can probably ship it in a priority mail small flat rate box for only a small amount more.