Re: Travelling fitness blog
Do it. Check out Nerd Fitness for a bit of a model.
Just make sure you are sharing useful information that others can follow.
Maybe review the gyms you find, how to get a workout in a hotel room, where to find the best high protein meals in various countries, local sports people should try like Muay Thai, BJJ, etc. This is another blog that might be worth checking out myfightcamp.com which is a sort of guide to Muay Thai in Thailand.