One issue has bothered me since I first commenced observing variable stars 20 odd years ago: the inability to follow LPVs throughout a complete season.
Those with a robotic observatory do not have this problem, nor do highly motivated observers with stamina who are prepared to observe at any time of the night. I belong to neither group.
Of course the issue is that the observing times for a particular target will start early in the morning prior to dawn twilight when the target first appears in the east above your observing horizon, will progressively become earlier in the morning / night through the season, and end in the early evening just after twilight when the target is close to your western observing horizon.
STRATEGY
Determine the date and time when the target first becomes visible above the eastern horizon in the early morning before twilight.
Attach the DSLR camera to a polar-aligned equatorial mount with the frame width orientated east – west. The DSLR will be controlled by a computer running image capture software.
At any time after dark, with the mount undriven, point the camera precisely at the DEC of the target above your eastern observing horizon.
Take a short exposure image and note the precise time of the exposure. Solve the image and note the RA.
Subtract the RA of the image centre from the RA of the target.
Add the result to the time at which the short exposure image was taken. Call this the “target exposure time.”
Use your capture software to take a set of images for photometry centred on the target exposure time.
The altitude of pointing and the target exposure time will change as the season progresses.
Disclaimer: the above has not been tested. I’m sure comments will appear if anything is incorrect.