5 ft bed rack on 6 ft bed?

My friend put the fear of god in me with roof rack leaks or getting straight up torn out. No roof racks. But I Just ordered a Smittybuilt overlander tent amd was wondering if anyone has a 5 ft rack on their 6 ft bed. Does it support the tent as well? Looking at the RCI rack on Toytec's website.

I'm a residential carpenter and my truck is a work truck 5 days a week. With a bed rack, I'd be swapping my ladder rack out for the bed rack and tent for trips. Is there a big difference in drop in time between the 5 and 6? Could i, need be, fit a few sheets under the 5 foot rack? Any reason to go for the 6 over the 5 for a tent?

Thanks much for any reply!

Also, first post in this place. But I creeped the shit out of these forums before I lifted my truck!