I often find myself in situations where I have to crawl the last 100yds or so. I can't crawl with my pack on [EXO] as it rides up and prevents me from looking up and ahead easily. I like to shoot off my pack so I'll sometimes drag it along next to me. I'm wondering if anyone is able to crawl effectively with a frame pack on. I don't think I have a fit issue as I've read a ton of fitting articles and watched the EXO video. Maybe this just can't be done effectively?