The grandaddy of all US domestic contests, the ARRL Sweepstakes CW, is this weekend. SS starts at 2100 UTC Saturday and runs through 0300 Monday am. Full info can be found here
If you don't like crowded bands, and you want to have fun calling CQ: get on late Sunday evening and you will be what is commonly called "fresh meat." For brief periods of time you will get to experience very, very loud US pileups - sort of like being a DX station in the Caribbean...
73 John K3TN