Where are you located,steve?
Maybe the NW,since alder is very mild and used there for fish.
The chips burn quickly and can work for hot smoking fillets for 45 mins,or so.
Yes, in an emergency ,we can find a way to burn up almost anything.
There are lots of ways to make something simple complicated,like finding a substitute for wood chunks.
The woodboxes on the Cookshack are made ,very thoughtfully, to work well with zero thought with wood chunks.
Most box stores,Wallyworld's,etc have a variety of chunks.
Cookshack and a number of on line sources can provide excellent wood chunk variety.
A neighbor's tree?
A tree removal service?
It is much more difficult to acquire and store pellets,just to have the inconvenience of using them.
Just my $0.02