If you have a decent amount of RAM in the machines that you are going to use the stick on, I would skip the swap.
Just use a single partition and mount it with the noatime option.
If you have more that 2GB of RAM, you can locate /tmp in RAM.
none /tmp tmpfs nodev,nosuid,noatime,size=1000M,mode=1777 0 0
Much more information here: