I'm not sure what to add here. Duffer and Knightrider are right. With your camping equipment and the RTT, your stock suspension is going to suffer.
Our AAL didn't give us the support we needed, but that's because we have skids, sliders, and a dual swing arm bumper. I kinda think without all the extra armor, we might have been okay with the AAL. But that's just speculation.
Seems like everything we do to our rig, it affects something else. It's just the way it is.
Even without the RTT, getting an AAL has its benefits. And there are plenty of peeps here willing to help you install it.
But back to your original questions:
- yes, you will need longer bolts and brackets to fit over the OEM cross bars (they are thick buggers). Let me know if you need deets.
- yes, the OEM rack will hold 2 adult weights (if you are both 250, not so much.....)
- no, getting AAL's should not affect your everyday commute - but it might improve your off-road ride
There are some definite advantages to having the RTT:
1. Quick setup and teardown
2. Ability to store bedding in RTT (leaving more room in vehicle)
3. You don't have to unpack/repack rig every time (like sleeping inside rig)
4. No unexpected guests (snakes, scorpions, coyotes, etc.)
5. It's rather comfy with the mattress - and kinda like sleeping in a treehouse.
6. Chick's dig it....trust me
Disadvantages:
1. There is a tent on your roof - you will feel it on a windy day going down the freeway
2. You can't leave it at the campsite and go wheelin - it always goes with you
3. Setup can be a tad messy if you just went wheeling in the mud...ask me how I know.
BTW - that's a nice looking tent you picked out. Ours came with a zip-on Annex. We don't use it much. But if we were to camp in one spot for multiple nights, it would come in handy having that extra room.