[whyhellothere]

I don't claim any specialist knowledge re:pricing (so bare that in mind while weighing up my response).

I'm not sure about the 1 month trial thing (I think your demo is strong enough that people will understand what your apps about). I get that you want people using it, then when they can't live without hit them up for some money, but you may be cutting your market in half as i'm sure there are a lot of people who travel for 2 weeks who would use your app for that period of time.

As for day-trippers, won't they just use facebook or flickr? I thought your app was better for proper journeys as you can include elements other than photos (google maps etc).

One last thought: My older relatives always used to make physical scrap books of their travels (with photos / tickets / maps etc) in them. A possible extra/alternative source of income could be to sell the physical version of their online "story" (again not necessarily for them to keep, but to give to other relatives)