You just got to lean the bike over to allow your inseam to pass over the griptube...sort of like steam to wheelchair? Hahaha.
I'm not very tall, and run tall and wide bars, so maybe there's some little secret, I just never thought about it. Hold up, I'll find some pics I guess...
Old pic (4 years ago), super low crotch of pants, but can still walk over fine.
8" tall bars, with an extra 1" of spacers, 25" width...this is actually halfpack to hang 5/10.
Steam to wheelchair. You can sort of see how the bike is angled. It helps if you're able to roll the steam one handed, and the angle helps with locking it in to this position.
I hope I's any help.