Newbie looking for some assistance

I would suggest that you see a toyhauler first hand. Because of the dual function the restroom and the kitchen are usually near the front while there is typically crank down bed and a folding sofa in the space where the MC would be. Once the MC is rolled out you have a relatively large living area compared to most trailers. In pleasant weather you can also lower the rear ramp to really open up the space. Loading the MC into the toyhauler is also much, much easier than getting it up into the pickup bed. A tri-fold bed cover would be great for the pickup and you would be able to safely carry fuel cans and a 3k generator in the bed as well as other miscellaneous stuff that you don't need to clutter up the trailer with.