Should I be concerned about the long term?

If you find the leak and resolve it you’ll be good. The damage really happens over months and months of not knowing there is a leak. This is truly a weird one. Sounds almost like it’s condensation but enough to wet the inside as you describe is strange. Was the slide in our out, if out are you parked with the top of the slide leaning into the trailer (unlevel high on the driver side)? It could be a slide seal letting water in. I had a weird leak like yours and I flooded the outside with the hose for 15 minutes. I’m brazen like that. Turns out mine was a leak through the window frame above the couch. Some older model travel trailers had particle board floors which would be pretty ruined in one leak. Many switched to plywood. And now they are using particle bond. Check your floor in an area without the laminate. You can even cut a small spot inside the bottom of your cabinet under the sink etc.. to see what your flooring is made of. If it looks like particle board but has a plastic texture to it you’ll be good there and no need to worry about a swollen floor. Also the inside walls are usually Masonite and they can swell with one leak but if there is no visible damage you’ll be good there too. Water could be on the inside of the wall and sweating through, explaining the drops forming on the wall. You may have a leak in the slide roof. Again mold and dry rot will not happen this quickly from a few leaks. Don’t stress. Just find the leak and you’ll be good if it all dries out. That is one beautiful trailer too. Congrats!