Leave your pictures on your computer!!!
Use the RVnet photo posting url.
http://photoposting.is-great.net/?i=31.Click on the button 'select'.
2.Open your picture file.
3.Click on the picture and open and it uploads it.
4.It then provides you with the correct code to copy and then post on the forum.
No charge and no one holds your pictures hostage for a fee. AND BEWARE tinypic new rules, they now delete your picture links if there are not constant clicks on the picture link you posted. I've lost all of mine from not using them regularly. :R
BTW: I save the link to RVnet photo posting to my desktop so its just a click away opened in a separate tab.