Don't worry dude, the board can take it. There have been some pretty pic-intensive threads here before.

e.g.:
The Story of Ultra Magnus
My collection

If you're making a really long story, like an epic, one suggestion is to split it into different acts or parts and start a new post for each act.
This is what I did for my Transformers Vs Star Wars photocomic (which is an adaptation of Shakespeare )
Act.1
Act.2