Trading down is a good idea, but only if you get additional value in your picks (compared to what you give up). I assume your draft is a snaking format. If so, maybe try to trade down to a the #10, if it will give you a bigger boost later. For example, you could do your 1st and 3rd rounder for their 1st and 2nd rounder. Or maybe your #1, #2, and #4 for their #1, #2, and #4. That would move you up towards the top of rounds 2 and 4, but you still would get the WR you like, late in the 1st round.
Let us know what you decide, and how it works out for you!
12 Team Re-draft league
Start 1QB, 2 RB, 2 WR 1TE, K, D/ST
1/10 yds Rec/Rush or 20 yds pass; 3/pass TD; 6/rush-rec TD