We did this section last May 3,4. Flow was ~2,500, bigger water (4-5K) would have made the run quite a bit harder. Here's my TR from another post:
"Just got back from the charred remains of the Dewey Bridge. Here's my info on Gateway to Dewey (@ ~2,500cfs)
Put on the water at the Gateway bridge Friday evening around 6:30 with the plan of camping at one of the island camps before stateline (miles 4 and 5 of the trip in the guide book). When we got to the diversion dam rapid it was nearing dusk (bad timing), and I missed the opportunity to scout. I would suggest a scout of this rapid if you have time, if not, run far left as the middle and right sides are carnage (don't underestimate this one, it has the potential to really mess you up if you run center or right). Since dark was quickly upon us, we made an impromptu camp under a cottonwood on river right a couple hundreds yards downstream of the rapid.
Saturday, stopped to scout stateline. Checked out the left side first. Very tight with many pour-overs and wrap rocks. No strainers, but you don't want to run left if at all possible. We ferried over and checked out the preferred right run. The run was pretty straightforward at this level. Entered in the right channel and split a couple pour-overs just to the left of the gravel bar. Continued this line straight into a small hole and punched through to the slack water on river right. Ferried right and entered the right channel (split two large rocks) around the lower island. There is a pretty decent hole directly in the middle of the channel that you need to square up to or skirt just to the left. Rest of the run is cake. High water could be pretty rough.
It is worth noting that there was apparently an ATV convention or a family reunion on the west side of the river. four-wheelers up and down the road all day.
Anyway, continued on to Beaver Creek which we scouted in two different sections, upper and lower. Upper section is easy, just avoid the right side as the wave train (which is tempting) leads into a couple rocks that could be problematic. The lower section is a bit tougher. House sized boulders and large rocks constrict flow into very narrow runs that require some fairly quick moves. At higher flows this one could be tough, with wraps a very real possibility. The camp above the rapids is decent, but the road runs behind it and there was a lot of ATV traffic as already noted. A few miles below Beaver Creek the road ends and the canyon narrows. We continued down to about trip mile 17 and camped river right (the camp that the guide book calls a "Grand Canyon Class Hike"). Nice little camp with early shade and a fair amount of sand. The hike is very nice.
Sunday, we rowed the final 16 miles of the trip (not much to note).
There were few "established" camps that I noticed, with those already mentioned being the best. That said, there were many potential sites that would work just fine in a pinch. After Beaver Creek we didn't see another person until we hit Robert's bottom near the confluence.
I hope this info helps anybody planning a trip down that way (info seems to be kind of hard to come by)."