Sold my old rig and starting over -- Need advice!

Personally, I would stick with a tent trailer, this is what we had during our young kids years and felt it worked well for us. A king on each end and a table bed will open up many more sleeping options than a hard sided TT. Our kids were outside almost all the time so we used the trailer pretty much for sleeping. The relative lighter weight of a tent trailer will give you far greater number of options relative to a tow vehicle; maybe a diesel Sprinter van, space plus fuel economy.