Tex, many of your thoughts above regarding RTT vs trailer (and if the 4Runner would be a good tow vehicle) and love/hate relationship echoes my feelings with my 5th gen 4Runner. Any updates on your plans for RTT or trailer, or long term plans with the 4Runner?
I will say that after owning three 5th Gens now, all of which have towed some sort of load at some point, I wouldn't want to tow anymore than 3,000lbs on a regular basis with the 4Runner. Sure, they are rated for more and can do it, but in my experience it isn't ideal or an enjoyable experience. The short answer is that there are much better options out there for towing, but if you only want to tow a small utility trailer or camper then they are fine. If I were going to be towing on a regular basis with mine I would add a REDARC Electronic Brake Controller. The only off-road focused trailer I have gotten serious about is the ITW trailer and with their cost steadily increasing into the upper $20's and over $30K for the moto version it is quickly becoming less appealing from a financial standpoint. That said, I haven't fully written the idea off just yet so who knows.
In regards to a RTT it's well documented that I am not fond of them. I am even less fond of the idea on the 4Runner in particular as they are so easily impacted by weight and aerodynamic drag, not to mention all of that dynamic weight up high on a vehicle that is already somewhat top heavy and tippy when lifted. Another consideration is whether or not you keep it on the vehicle full-time, will it fit in your garage with it on, and do you have the readily available man-power to help with removing and installing it each time. If not, do you have the ability and room to create some sort of pulley system apparatus to remove it by yourself? I have neither so removing it when I am done is out of the question and I don't want to be driving around full-time with it on the roof.
I have owned the soft cover style RTT's in the past and I can't stand dealing with the cover so if I were to ever consider another RTT it would be the hardshell style. JB, AutoHome, AluCab, EeziAwn, GFC, etc. are all viable options in that market along with a few new comers as well. Expect to pay $2500+ with the majority of them in the mid-$3000's.
In regards to the long term plans for the 4Runner I am still in limbo. There are things about the 4Runner that I love and there are things that I despise about it. When I am honest with myself about what the 4Runner really is then it is easier for me to like it. Around town it is a pleasurable vehicle to drive, easily in and out of parking spots and half-decent fuel economy with loads of room for groceries, the dogs and other items. Get it out on the highway and it is noisy, easily tossed by the wind, and not very sure-footed at speed, this is where I dislike it. Traveling with lots of gear and luggage along with the dogs becomes an exercise of how much crap can I strap to the roof rack. It does however do extremely well in soft sand at the beach which we frequent almost weekly where we live, it really is a fantastic off-road vehicle, the perfect size for most trails.
It really just depends on which day of the week you catch me on in regards to how I feel about the vehicle. For example, yesterday I was all about the 4Runner and I was online looking for further mods in anticipation of possibly keeping it around for a work vehicle and beach cruiser. If you had talked to me on Monday and I was more focused on the idea of going back to a HD truck or possibly even a Sprinter for the motorbikes.
This all really boils down to me and my personal fear of commitment when it comes to a vehicle lol. If it were up to my other half we'd keep the 4Runner around for the long haul and it would be used as a run-about and/or third vehicle and that very well may be what ends up happening in the end. But I haven't yet committed to that idea just yet and until I do I will be trying my best not to further invest in mods for the 4Runner which really sucks because it's not where I want it to be and I enjoy the build process. So in closing I don't have a clear cut answer for you and I doubt that I will until later this year, for now I am sitting back and letting things ride as they are.