I would like to do long dolly shots, while booming up or down. Some of the longer dolly shots require that the camera pushes in while booming down. I obviously don't want to see the tracks in the shot, so the camera should be feets ahead of the dolly.
I can think of two possible options:
1. Use a dolly with hydraulic boom. Either PeeWee or Fisher. Then use a 36-inch slider or camera plate extension to keep the camera ahead.
2. Use a dolly with hydraulic boom. Either PeeWee or Fisher. Then use a small Jib arm to keep the camera ahead, and use the jib arm to boom down.