You actually don't need Photobucket (I hate using those online "services", so I'm a bit prejudiced)
You can upload pics here, easily, but they do have to be resized - I use a free program called Irfanview which is super easy to resize with (after all, I can do it!) and I use 600X800, that size uploads easily and still has plenty of detail.
What you do is go to the User CP tab above, scroll down to pictures and albums and upload your pics there. The site allows you to have 1000 pics IIRC. Then when you want to post simply link using the little pic square tab in the post message box and post the address of the pic from your albums. To do that, once you've uploaded a pic to your ablum here, right click on the pic, click properties, copy the url address and paste it in the dialog box that opens when you click that little pic icon above. Click OK and there you go...
Here is a pic from my album of my old Jag to show how big a 600X800 pic is and what detail is there....the only real practical difference between using Photobucket and storing them here is the url address, the method is the same. But you don't need a Photobucket account....you simply upload them from your computer to here.
View media item 16214