For casual travel photography, JPEG is honestly fine if you're happy with your results. The real issue isn't whether RAW is "worth it" in some absolute sense - it's what you actually do with your photos afterward. If you shoot, maybe tweak brightness and saturation in your phone, and call it done, JPEG handles that perfectly. Your A6700 does excellent in-camera processing, so you're not losing quality there.
The difference shows up when things go wrong or you want creative control. I took a trip last year where I shot mostly JPEG, and I got caught in some tricky mixed lighting at golden hour. When I got home, I wished I'd shot RAW because I couldn't recover shadow detail or fix the color cast without the image falling apart. RAW gives you a genuine second chance - you can pull back blown highlights, lift shadows, and shift white balance without destroying the image. With JPEG, you're locked into what the camera decided at that moment.
Storage is the real conversation. Your A6700 shoots big files, and if you're traveling with limited cards, that's a legitimate constraint. But here's what works for most people: shoot RAW for situations where you know you'll want control - moody interiors, tricky exposures, important moments. Stick with JPEG for snapshots and obvious daylight stuff where the camera nails it anyway. You don't have to commit to one or the other. A middle ground might be keeping larger cards for trips (they're cheap now compared to what they were) and being selective about what format you use. That way you get the safety net when you need it without bloating your storage for everything.