Pacific Creek Float-ability

I just did the five miles of Pacific Creek from the junction of Gravel Creek and Pacific Creek (what Forest McCarthy recommended in his guide to Jackson Hole Packrafting). I was curious if it would be possible to go higher up and float more. I’m paddling solo right now and don’t want to try anything too hairy. If its a lot harder then what I already did I’ll pass till I can find a packrafting partner.