+1 on Tony's advice, 1 cu ft box, 3 varieties, double-filet. You'll probably still have to spit the double filets to get them to fit. The 2/3 cu ft box is also a good choice. Enough wood to last quite a while since these smokers use so little. Their website is just pretty terrible. But their wood is great! You might need to try a different browser. I'm using Chrome, and it's a little weird. Safari works a little better. The link below will get you to the double-filet page. Type in your 3 wood selections in the field under the "box size" pull-down menu. My top 2 must-haves are hickory and cherry. For the third wood, I usually choose Maple. Nice mild wood. I also like red oak for beef, so I'm pretty torn on the 3rd one. If you like poultry, you might want to try pecan. I don't know if they have pecan, since I can't seem to find a list of wood species ANYWHERE on their kind of goofed up website right now. Can anyone else find a wood species list? They've changed their website, and now I don't see it. You can also ask smokinlicious for a couple samples of some other woods, and they throw them in your order for free. You can ask for them in the "wood selections" field. And the samples are enough wood for several smokes.
https://www.smokinlicious.com/double.html