1st gen Tacoma's use the standard eyebolts at all 4 corners because it has a steel bed. Later gens use mounting bars across the bed because the beds are a composite plastic material. For eyebolt reinforcement under the bed I used some rectangular thick aluminum pieces that are drilled for the size of the eyebolt and go under the bed to minimize pull-through by spreading the stress over a wider area compared to a standard washer on the end of the bolt.
I think FWC might have a pre-fab kit also includes aluminum pieces to put under the "elevator bolts" that are bolted in the camper. Those elevator bolts will already be on the camper you buy, but the aluminum pieces are recommended to minimize any pull-through of the wood in the camper where they are mounted. Sorry, no pics as the camper is mounted, but I'm sure there's several threads on this topics that might have pics.
FYI - posting and searching the Four Wheel Camper sub-forum on this subject will probably result in several responses.