Originally Posted by Michel Gagnon

Bear in mind that the Xtracycle is a semi-permanent attachment to your bike. Installing and removing it takes some time so you might do it before a tour, for example, but not because you want to use the cargo capacity on mondays, wednesdays and fridays (for example).

Besides, you have more carrying capacity with a small trailer such as the Burley Nomad, let alone the Bikes at Work trailer. And with the 64" Bikes at Work trailer, you'll have enough support to carry easily 8' boards and planks.

So the decision is:
– The Xtracycle will always be there; but it will make your bike less interesting, less lively (not a real issue if you have other bikes) and you'll have to work a bit to attach whatever cargo you want to carry.
– The trailer is not always there and even when empty, it has a bit more drag and doesn't fit as easily onto winding trails. If your lumber yard is on your way to work, it means that on days you want to buy lumber supplies, you need to bring the trailer with you. But packing is downright fast and easy, and on days you don,t need it, you have a nimble bike.