single stage vs base coat clear

I have purchased the single stage paint for my 65 Barracuda. Almost everyone I have spoken with tell me I should use Base coat clear coat. The car will be a driver who will frequent some car shows and club rides. Is the difference really that great. I have time limitations and was trying to do the best I could myself. I'm not looking for a show car but really would like it to look good.
Any advise from you guys who have painted your cars. My car will be out on nice sunny days and will live in a garage.
Thanks for your advise!