Traeger's pellets are, or at least used to be, either 100% single species wood or either a blend ~ 30%/ 70%, or flavoured. The 100% being alder, maple and oak. The alder and oak being base woods = the
70% portion of the blend. Alder from the Western pellet manufacturing plants + oak from the East. The 30% being apple, cherry + ? These are more $ and less abundant. The hickory and mesquite are base
woos, sprayed with liquid smoke. An oil added to the ground wood prior to being forced thru the dies, for what I gather, a lubricant. No one else that I know does this. The lignin in the wood acts as a lubricant
+ binder.
Blends are not necessarily inferior. The reasons might be: cost, material availability, flavour etc.... Think coffee beans.
5 gal buckets should make an excellent pellet storage container, IF, clean and not previously used for anything that may leave any residuals. The plastic recycling codes should help choosing the container.
https://en.wikipedia.org/wiki/Recycling_codes.
Desiccant. Moisture thirsty, yes. Food safe
Explosion lighting/relighting. Lighting, I would say not unless there was some sort foreign combustable substance present such as propane, natural gas, or gasoline. Re lighting. I have only heard of ! case
where an overflow of pellets resulting from a no start, generated a small BOOM... If a pit fails to start, never try a restart w/o investigating out the cause. It may require opening things up for a look.