Naturally, the article I read recently is now lost in the vast ethernet. So I did a google search... "How to make your own smoker box" and the funniest thing happened... Third suggested link... AskRuth... which is also... ME!... had the answer I wanted and I wrote it back in 2006. Another great reason for me to write blogs! I had forgotten all about it.
Perhaps I didn't use enough wood chips... I just have a small Weber Q with one rack and thought one cup of soaked apple wood chips would do. It wasn't very smokey and it did take longer to reach a hot temperature, but ... with the help of Peter of The Fish Shop at Pier 20 (the Seaport Farmers Market), his heavenly salmon fillet and his own Maple Sugar Rub with secret spices... it was still delicious, served with some grilled asparagus from Noggins Corner Farm Market.
And did I mention that it took no sweat at all in the kitchen! So, so flavorful with so little effort? Perfect for the hot smoldering summer nights to come. By then I'm sure I'll get the "smoking" down pat. Any suggestions from those who've done it successfully on a little BBQ, please leave me a comment.