Can I add an RV circuit?

I'd like to add a 30A 120v RV circuit to my panel and I'd like to know if I can do it on my current panel. Attachment 50226 (http://www.doityourself.com/forum/attachments/electrical-ac-dc/50226-can-i-add-rv-circuit-img_1988_1.jpg) Attachment 50227 (http://www.doityourself.com/forum/attachments/electrical-ac-dc/50227-can-i-add-rv-circuit-img_1989_1.jpg) Attachment 50228 (http://www.doityourself.com/forum/attachments/electrical-ac-dc/50228-can-i-add-rv-circuit-img_1991_1.jpg) I'd add the circuit to one of the extra spaces at the top right of the panel. I'd use #8/2 wire and the run is about 40'.