If you don't use a trailer, do like alot of people without a trailer. Back your truck down the boat ramp, better right in the middle of the ramp, dump all of your boating supplies. Then take 45 minutes getting your boat ready while 15 other people with trailers wait to back down the ramp. This seems to be standard practice anymore at the ramps. Our society of ignorant narcissists.
For 99% use on lakes, why not get a drift boat? It will be much more comfortable, motor mounts much easier...in fact everything about a hard boat makes it a better tool for flat water, IMO.
For the 1% other times, head to the Colorado or Lower Fork with the drift boat.
Your research should consider rowing performance and experience, some rafts are designed to row while others are adapted from whitewater aspects, and there’s a big difference. Floors, tube size design & rocker, frame, and weight capacity should be your hallmarks for the craft you purchase.
In this case, why not an aluminum jon boat? 10-12ft would fit in the bed of the truck, could take a small gas or electric motor, and you can find them with oar locks ready to go. Or as previously posted...Porta Bote. I'm not trying to completely talk you out of a raft, I just think there are so many other crafts more suited to lakes.