like talondale said, go in with a weed wacker sometime over the summer and then once a month before the season or so. once the first frost hits you wont have a problem anyways...
i feel your pain. i walk down a gasline to some of my spots. its on state game lands...usually the gaslines and game commision trails are cut before the season. went in last week and got on the gasline and was upto my head in golden rod and choking and sneezing like mad.
the game commission trails were cut though

guess the game commission dont cut the pipelines...
then i was leaving and seen a dude on a tractor and a truck beside him. went to check it out...looked like they were brushhawgin my pipeline

hopefully its done...i will be there monday
and generally deer wont be alarmed by your trails. youd be surprised but they will most likely end up USING your trails. id even cut a couple extras if i had time in the summer just for the deer. dont go over board...but opening things up wont hurt none...weeds grow like mad anyway...i got pretty mad the other day to find out the deer i seen didnt follow the DEER trail to feed on acorns but fed on a semi new logging road feeing on nuts and growth along the logging trail....
good luck