I have a 2010 a 4 x 4 Tundra Crew Max which I also really love but left at home to take a Class B - Ford E350 chassis - on the road. I have been full time now for over 6 months and 12,000 miles in the B. It has it's benefits for sure and I am pretty happy. Plus there is no perfect set-up, so in general you have to give up something to gain something.
I will never (fingers crossed) sell that truck especially because it is excellent to go many more places than I can in the B. I love my campervan, but it is often that I wish I had my truck too, so I think about what the right pull behind for my truck could be!
The main advantages for me right now are that I don't have to get out to set up if it is rainy or dark, and I am able to jump into the drivers seat and move more easily if it is necessary since I am a woman traveling solo. For me, that was a priority in order to feel more comfortable. Also, since I am not towing - it's so much easier to park and to get around in general. And it is quicker and easier to set up/break down camp, but that is an advantage only because I am often moving after a night or two right now and don't spread out...also I really can't carry much to spread out, so am limited by that as well!
I previously pulled a 30ft TT and the Tundra was perfect towing and perfect for exploring the area once there. But that was staying in one place at least a week and often a month or more! And yes, could carry lots of stuff ... miss my kayak, my ice maker, a lot of my clothes, more & bigger chairs and toys, well, you get the idea! On the other hand, I just don't have a lot of stuff now, so life is actually a lot easier.
Felt the need to contribute my two cents because I think you might end up missing your truck if you trade it in on something you aren't sure about. Just sayin....cuz it sure is a sweet truck!
I also vote for keeping your truck and thinking about a cargo trailer or even a small TT if it works for how and where you wish to travel. Maybe you could get out there like that for a bit in order to determine if you still think the van will be a better fit.
I hope this helps, good luck!