How now Brown Cow?
Likewise I have never flown a GPS sector entry holding pattern in other than initial GPS RNAV Appr training or IR renewals.
Its pretty hard to see why you would not be able to rack it round over one of the lead-in waypoints and make it to the IAF - helps if you slow down though.
I figure the holding published holding pattern is there for you to "park" in if needed while waiting to have another go at the Appr after a miss, or if someone has beat you onto the approach whose *rse you might climb up if you follow them down the Appr.
Dr