You can post a hundred photos via the attachment option, but the file sizes should be around 50K (not 2MB each or you will run out of space).
Yes, if you select the landscape (portrait button) icon above the typing window, you can drop images right into this forum from your photobucket or any other website. Here is an example:
This is actually the preferred method of sharing photos on this forum because it embeds them right into the typing window and other members don't have to click on them like they do with attachments.