I try to visit 1 different gym a year. I've only been able to make it to 1 out of state. Can't say it was a favorite though.
Like everyone said, call ahead. Some places will have gi requirements that can be color or patch related. It's also nice to know if they will have a drop in fee so there is no surprise there. Some schools don't always have up to date schedules posted. If you aren't sure when you get there it can be a good idea to ask about their etiquette when it comes to things like leg locks. Some places do them and others don't.
Often not discussed if you are an upper belt be prepared for some tough rounds. You might be on vacation, but in some (not all schools) you will be looked at as a challenge or way to prove something. I'm fairly certain we've all done this visitor at some point.
Lastly, have fun!
Commented on What helps you more when working on a new technique?
28 May 10:38
I need mix. I need to hit the reps to understand the movements. Once I have some level of understanding I like to add in varying levels of resistance to see if I can actually apply it. Once applied it'll float around in my memory.