Headlight Trouble

[NotNuRodz]

I took my truck to it's first cruise night last night and everything went great until i got into my truck after dinner and tried to turn on the head lights and had nothing. They were working earlier in the day and I even had lights working on the dash when the switch was on.

I've been looking all day for loose connection thinking that something may have jiggled loose during the drive, but so far no luck. Any suggestions at to what I should look into now, I'm not a wiring expert and really have never messed around to much with electrical systems so any advise would be helpful.