It's no problem to add photographs to forum posts and we'd enjoy seeing some of your pictures from your trip to Oz.
First of all you will need to open a free image hosting account such as
Photobucket
Use your account settings to select 'privacy' so that your pictures can't be edited by others and then upload your pictures from your computer following the simple instructions on Photobucket.
When the pictures appear in your account hover the mouse/ cursor over the first one and from the options bar which will appear select 'EDIT'
The picture will then appear in the edit suite, click on 'RESIZE'
Click on 'PRESET SIZES' and from the drop down box select 'MEDIUM'
The picture will then be able to fit onto this forum, click 'REPLACE ORIGINAL' and the newly resized picture will appear on your Photobucket home page. (resizing will not affect the photograph stored on your computer)
Hover your cursor over the resized picture and from the drop down box copy the direct link (2nd box down)
Open your PCv forum post and at the top of the comment box click on the rectangle with the tree icon from the toolbar along the top edge of the comment box.
Paste the direct link from Photobucket into the url box, set the alignment to 'left' from the drop down and click on 'Insert'
You don't have to bother with the other boxes, just the url and alignment.
Add any comments underneath the link that you will now see in the comment box, click 'Save' and your photo should appear in the posting - Seemples!