i agree that a trailer in a motel parking lot is not secure.

Back in the mid 60s, we'd go away for the weekend. Doors unlocked. Car in driveway with keys in it. Never worried about theft. Then a house was broken into which changed our security concerns.

I have never trailered a bike. I live near Phoenix, AZ, where it gets HOT in the summer. Way too hot to ride. 120 degrees is not uncommon. Just 150 miles away, up in the mountains, it will be 85 degrees. I would love to have just an open single rail motorcycle trailer, so I could trailer the bike up there in my air conditioned car, unload it, ride around all day, then load it up and haul it back home. I could also pack a tent and camping stuff in the car, trailer the bike up there, set up camp in one of the national forests, and spend a few days riding on the forest roads. But unfortunately I don't have any place to keep a trailer.

You don't need a trailer to haul a bike. Try one of these. I bought one to take my bike to the Track and Trail place 1.5 hours away, but haven't used it yet.
https://www.harborfreight.com/400-lb-receiver-mount-aluminum-motorcycle-carrier-62837.html

I tried one of those on a pickup with a camper on it a long time ago, but only once. First, even though it was a proper fit for the receiver on the truck, it was really loose. The ends would rock up and down 6-8 inches. And on even a slightly bumpy road. the whole back end of the truck would almost jump up and down on the road, due to so much weight being so far behind the rear wheels. It had the see saw effect. It was beating the crap out of that carrier and my hitch. The combined weight of the carrier and bike would be around 400 pounds, but could put several times that much stress on the hitch from hitting a bump. With it constantly going up and down like that, it wouldn't take long to break the hitch.

I plan to talk to my former sister in law, their family owns a cabin up in the mountains where I want to go. I'm hoping they will let me park a small trailer (just big enough for the XT) at their cabin. It would be inconvenient, I would have to drive up there (about 120 miles) hook up the trailer, bring it back empty, put the bike on it, then go back. Then I would have to haul the bike back home, unload it, then take the empty trailer back up there and leave it, and drive back. I wouldn't go through all that unless I was planning on staying up there at least a week. But with gas prices being literally a dollar a gallon higher than they were late last year (where I live anyway) it would be expensive. But it would also be fun. The idea of spending a week camping in the forest, with a dual sport bike to ride all day every day, well, it doesn't get much better than that. I would only do it maybe 2-3 times during our 6 month summer.

There is also the possibility of widening my driveway, or tearing down the concrete block wall in front of my house and putting one in with a gate big enough to get a trailer through. But it would be several thousand $$$ either way. And it my possibly lower the property value. There is also the possibility of renting a place in a storage lot. Last time I checked, it was around $100 a month to rent a space big enough for a small trailer in a fenced dirt storage lot. Yet another possibility is finding one of those little single rail trailers that can be taken apart and carried through my front gate in pieces. I can put whatever I want behind the wall. They used to make what was called a "trailer in a bag" which you could do just that with. They were very expensive, and as far as I can tell they don't make them any more. Used ones turn up once in a while for around $3000.

There simply is no cheap or easy way to haul or trailer a bike for me. I've thought of every possibility. 15 years ago I had an old truck that I hauled dirt bikes in. It was a '75 Ford F250 with a 390 in it and a heavy utility bed on it, and got about 8 mpg. And had no A/C. Back then I was able to load bikes into it by myself with a ramp, but I couldn't do that anymore. I sold that truck a long time ago, and replaced it with something else. But I would have to have a low trailer anyway to be able to load and unload a bike by myself anymore.