That's what I've found. If I go to bed high, I either don't dream or don't remember my dreams. I also tend to wake up sweaty and less refreshed in the morning too (8 hours later). But if I give it a break for a couple days, even a 5 minute nap is incredibly refreshing and can have crazy vivid dreams that freak me out. One night (after taking a break for a couple days) I dreamed that I was smoking a blunt filled with chopped peanuts and weed (and it hit smooth too!). But then I got the munchies, tore it open, and ate the peanuts. Now THAT's a weird dream!