my back seats are out.. with subs in their place .. they get put back in maybe.. once every 5-6 months i guess, i build my sub box so it is very quick and easy to remove/push around for hauling stuff, takes about 2 minutes to take them out completely, the box will also stand on its side against the front seats to get out of the way or run lengthwise along the panels to get out of the way, plus its a nice place to keep an extra bottle of oil, trans fluid and ratchet straps (center compartment in the sub box)
fwiw.. i think its easier to just bolt and unbolt the seats, i took the pins out like zeus did and regretted it because its a pain to try to line the pins up, at least for me, it was easier to just line up the bolt holes