I don't have your brand of
chipper, but I do chip a lot. Some suggestions:
First, if you have problems clogging because of green foliage, you might try letting the branches dry out for awhile so the foliage either falls off or gets "crunchy".
Second, if you have a lot of green foliage to chip, sometimes feeding a branch without foliage, along with the green stuff (at the same time) will mix enough wood chips with the foliage to help keep it moving through the chute.
Third, slowing down and feeding one branch at a time will sometimes work better than trying to run several at once. I keep a pair of lopping shears handy to "prune" down larger branches into smaller pieces to feed in this manner.
Sounds like you have your work cut out for you. Wishing you best of luck with the project.