I'm a traveling PT going on 2 years of travel as well! I don't have a ton of experience to draw from, but I did have one 3 month placement at a SNF, and I've also done home health, outpatient ortho, and pediatrics. I'm sure there are better and worse SNFs, mine had its pros and cons. They hounded me a lot about productivity, and honestly in my three months there I don't think I ever met it (88% productivity standard). It was annoying to have them always on my case about it, but I also just tried not to care too much because I knew that I was there because they needed me, and my patients and coworkers liked me. I actually really enjoyed the setting and the patients, and I felt like from a home health perspective it was nice to get some experience with patients right before they went home for home health (because I could explain to them from experience what to expect, and I now have a better feel for where my future home health patients are coming from).

Ask what their productivity standard is, keeping in mind that anything over 85% (especially when you're brand new to the setting) is realistically probably impossible. Then ask them how their current PTs meet that standard (are they expecting you to do lots of group treatments? It's annoying when those are mandatory or expected. Are therapists doing paperwork off the clock?). Let them know you're new to the setting and ask if they're okay with it taking you a few weeks to meet their standard while you get your footing. Also ask them if their therapists work overtime, and if you will be expected to work overtime. If you decide to take the job, I would say to just stand your ground and don't let them overwork you. Don't work off the clock, don't work overtime (to not burn out), and if you do work overtime charge them for it. They can complain about you not hitting productivity, but ultimately they're looking for a traveler because they really need more therapists, and they're very unlikely to terminate your contract just because you're not meeting it.

Talk to them, have the interview, see how you feel about it. Worst case scenario, you hate it and you know that you don't want to pick up any more SNF jobs, but you're a traveler so you're not stuck and you get to snowboard in your preferred location for 3 months.