I agree, just walking around a bit inside your boat is probably not going to help much. You really need to get out where you can take a decent walk, develop a stride, and adapt to the heels. It seem like your only choice here is to place your boots in a back pack until you get somewhere that is suitable for a decent walk. The other issue is what to do with the back pack once you find a decent spot.
I have wrestled with a similar dilemma with some of my more challenging boots/heel heights. Sure, I can walk around the carpeted hotel room fairly well, but hitting the open sidewalks was another story. I would quickly tire and get soar, and I'm sure all this was showing in my strides/steps, which ultimately attracted just the type of attention I did not want. One way I have realized when I am comfortable/confident with a particular pair is when I almost forget I'm wearing them while out and about. One of my biggest issues is self confidence, so once I am proficient enough to almost forget I'm wearing them, I stop "overthinking it".