Need advice on getting a chair for walking with invisible disabilities

So I look “normal/fine” whatever u want to call it, my disability’s are invisible…. I’m going to PT and doing better than the last few years… Here is my issue, I want to start walking/hiking more and more, and I need a chair/seat, something to sit on to go with me… So I can stop and sit as needed. But if I get a walker and don’t Look 👀 like I need it to walk I’ll just be accused and maybe filmed for “faking” when the only part of the walker I need is the seat…. Anyone have ideas? Thanks a ton!!!!!