Since Isolation exercises cannot use as much weight, can you really put muscle on? I am asking because I do not have access to a bench with all sorts of barbells, just adjustable dumbells. Bench press/rows etc would be too easy, but with flyes and stuff like that I would have enough weight for them to be somewhat difficult. Just wondering if anyone has ever tried to only do isolation or something similiar with positive results.
Any exercise is better than no exercise, so you're better off exercising than not. I doubt that you will have the same kind of results using isolation exercises that you would using compound exercises, but given your circumstances, you have to do what you have to do.