I'm with Chris! He gave the most comprehensive solution to the dpn problem of what I call "gaposis" between needle changes.
Try his ideas. They'll, no doubt, help you. One little addition—you can also change needles a couple of stitches early to sort of balance off the number on each needle.
The only glitch may occur if you have to inc. or dec. in an even pattern. You might be a little confused on spacing so pay attention to the beginning of your rows.
Course, I don't know if you want to listen to me. With dpn's I cheat all the time. I have a terrible time with the first row or two. All that writhing and twisting of the beginning stitches gets me unglued. . . especially in a dark yarn plus some days when I wash my hands and then can't do a thing with them.
I will compensate my ineptitude by knitting the first 2 rows (sometimes on a straight needle, sometimes dpns, sometimes circulars) without joining. After 2 rows I'll join. Then, from a straight or circular needle I'll divide my stitches, join and forge ahead. Only have 2 seam sts. to sew when done and all the other beginning sts. are much more in control. It works for me.
Any other cheaters out there have a better idea, I'm all ears.
Don't give up. You'll be able to do it.