I'll just underscore what's already been said here. Portable operation is popular and can be lots of fun. If you're operating near a vehicle, you can afford a bit of weight for batteries, rig, and antenna supports, so you've got quite a bit of flexibility to set up a good HF station. If you're carrying your radio for many miles in a backpack along with your camping gear, you're a bit more constrained, but you can still set up a station capable of contacts many states away, and even across the oceans when you're lucky. For a given power level, CW carries farther than voice, so it's worth the learning curve. CW takes time and regular practice to learn, but it can be done, and I've seen many people of many ages do it. But until you get comfortable with CW, SSB can work. The computerized digital modes can carry as well or better than CW, but they require a computer with its own power requirements. Nothing beats CW for its combination of simple gear and amount of range for a given power level. There are lots of very small CW-only rigs, many available as kits (and many discontinued and only available used). When considering gear, look carefully at power consumption, both on receive and transmit. Batteries can easily outweigh rigs if you're not careful. I've got pictures of my portable operations in my QRZ bio page. My equipment is far from the only way to do it, but it works for me. The SOTA sites already mentioned are good places to get more ideas.