So I scored a bunch of freshly pruned lemon branches in various sizes earlier today.  A few 3" - 4" branches, but most is 1" - 2" stuff.  I'd estimate if I cut all the wood into chunks, it would be two or so 5 gal buckets full after trimming off all the leaves and little stuff (the little stuff I saved - an additional better part of a 5 gal bucket there).    
Now, ask me next year about this time how this stuff smokes.  Maybe all the holes I tore in my hands today trimming these lemon branches down will heal by then too. LOL.
Working on hopefully getting some almond wood in a few weeks too.