you can always concider markers that are not acutally on the needle. (tie yarn in, take a paper clip or best a saftey pin as replacement if you do not have a marker to put into the stitch.)
If I knit on dpns, I always start my round on a new needle. I do not shift this around. but since the tail is at the cast on row and I do not change the position of the "needle switch" this is no problem at all. My rounds don't get marked there. if it were a very long tube and it would matter for my pattern I would concider to remark the spot sometime further up the work.
it is all different if you pull some stuff out. THEN you need a marker (in a stitch that will not get pulled) that tells you where to start your needle again.