To try Tripmii and for small trips BASIC is perfect. BASIC is free and includes all the key features you need to create a travel journal and share with your friends.
If your trip takes a little longer or you want Tripmii to be the new home for your travel diaries then you should check out PREMIUM. For only once € 4.99 / year you can not only use as many travel diaries and stations as you want with PREMIUM, you also get many useful functions. For example, you can set individual pictures to 'private' so only you can see them. Or you can set the whole travel diary to 'hidden' so that it stays hidden on Tripmii.