Hell yeah do it with straight weight! Bill Kazmeier never said "Aw shyt I forgot my mini bands, misewell go home."
The thing to watch with bands is that they SEVERELY affect bar path. Bench press is not a linear movement, and even though squats and deadlifts are, it takes muscles to keep the weight in line. When you use bands, you can detrain the musculature that it takes to stabilize the weight, kind of like a Smith machine. They're a great tool, but they can be misused/overused. The one time I did reverse band squats, I had the bands rigged too far forward and all I had to do was sit back a little harder and the bands helped me forward.
Why do you think Westside box squats the way that they do? Because they have briefs holding them up and bands holding them forward. Did I just blow your mind?