>>2702626High quality inflatables can be extremely tough. There are absolutely super cheap inflatables that will be shredded by sharp rocks and have leaky air valves, but if you buy from a reputable brand like sea eagle, advanced elements or a bunch of others, then you'll get something pretty sturdy, and most importantly, one leak would never be enough to sink you. Packrafts are also awesome, and if your main goal is portability and weight then I'd go that route. The caveat there is that packrafts will be much slower than a good inflatable kayak and won't track as straight.
If you want something portable that handles well and you're willing to carry a bit more weight to get to the water, I'd go with a high quality inflatable kayak, preferably with a drop stitch floor for stiffness. If you want to save a bit of money but still want a solid boat and are willing to carry a bit more you should be able to get a sea eagle 330 for about $300 including paddles, and that will be very tough, although not very fast. If you want light weight and want to hike a long way to water then I'd go with a packraft, just be aware that they'll be a bit slower
