IMO, having a flatbed camper should make it easier to maneuver under and get it lined up... I'm forever bumping into the back wider section of my camper with the tailgate opening, but once you've done it a few times, it's probably not a big deal either way.
I have four removable crank type jacks on my camper, which have 3-part "feet" that the back tires of the truck have to run over when loading/unloading. I wouldn't go that way again...
If you're not going to do any hard core offroading, I would suggest getting four hard mounted electric jacks instead. That would allow one person to easily load and unload the camper. They suck up pretty far for clearance, but the do stick out some so you'll have to be careful about snagging them.
I can do the four crank jacks by myself, but it's a lot of running from jack to jack to jack, since you don't want to rack the camper too badly when you're lifting it. As it is, my wife and i each take a side and I call out "20 up" and then we move to the other jack and do it again. And again. And again... Seems like it would be so much easier to just mash the "lift all" button and watch the camper go up... I rarely rock crawl with my camper, so four solid electric jacks seem like the ticket to me...