I purchased the swing away version bike rack from Yakima.
It can handle 4 bikes although fitting kids bikes is a pain, as it is with most bike racks. The rack is very heavy and solid. I had no concerns that it would have a mechanical failure.
I also purchased the locking hitch pins that take out the sway; otherwise with the depth and the weight of a loaded rack it has too much play.
When stopped, I could open the tire to one side, the bikes to the other, and access the van's back doors.
Below are pictures from the summer trip showing it closed, swing away, and the depth (length?) which is considerable.
While I had no issues with the rack, there are a few items that you may want to consider. It didn't work well on the front of the van. It mounted the kids bikes too high and blocked sight lines; in addition, we were in the southwest during summer and I was concerned about airflow.
Mounted in the rear, I was always conscious of that extra couple feet on the van. It made parallel parking more entertaining for the people watching. I use my daughter as my rear view camera; if you have an electronic one, it may an issue for you. The bikes didn't block my view and I could see the pink handlebar tassels waving in the wind through the rear window which reassured me that the bikes were still there.
The biggest downside is that the bikes get filthy in the back, regardless of the rack type. In general, the back of my van is always covered in road grime and if I were going to do anything different, I'd get a large bike cover. Unfortunately, I couldn't find anything suitable for the kids bikes. I didn't want to use a blue tarp so I ended up pressure washing them on a regular basis. I don't think I'd use this for expensive bikes but it worked fine for family bikes.
Due to the bikes blocking the license plate, I was stopped 3 times in Utah by the highway patrol . After a pleasant chat, I was off to the races again. If I were to carry bikes (in Utah) often, I'd probably figure out a better solution for that as well.
With these qualifications, I'd give it a thumbs up. I picked mine up off craigslist for $125.