I have seen many Aliner's and Chalets with kayaks and bicycles on them. No problem at all.
The advantage of the Aliner, least appealing and the Chalet are the hard walls, stay much cleaner, warmer and drier than any other pop up design. Really not a problem to lift the torsion axle. New brackets and what ever the lift you want and it is done. You can also order a torsion with a 6 inch drop, meaning lift. Unfortunately the Chalet does not come with the torsion axle. I have heard, never seen, that the Aliner has a tongue problem. I do not understand why as two brothers built these trailers and split up due to differences. I would think the main frame would remain close, but not certain. Both have a box outer frame, which is better than most.
Neither, nor the one pictured will take a lot of abuse, and definitely not a serious trail. Both are a little wide, but not that much, I think 82 inches, but possibly 80 on the smallest ones. Both could be made quite trail worthy though. Some are shown in other threads in this forum. Truly a fantastic design, and much larger than you think when looking at them. I have had two Chalets and loved them. One of the best production trailers I have ever owned. But both were made at the original factory in San Jacinto, California. The ownership has been sold and now they seem to be more on the mass produced scheme than they were. Try to find an older one. They are normally not cheap compared to the other pop ups, even used.