First time post - any help appreciated!

Question relates to a holiday home that we use some, but not every, weekend.  Bought 3 x HS100 smart plugs which control individual portable electric oil filled radiators for heating the 3 main rooms.  Manual thermostat dials on each radiator then control when to switch on / off heating element to maintain a certain temperature.  Its not overly accurate but if I got electric radiators with digital timers and digital thermostats these would lose the settings when switched off for long periods of time.

Smart plugs are connected to wifi router in holiday property and I can control on/off and schedules via the Kasa app on my smartphone.

I set the same weekend schedule for all 3 plugs that provide some pre-heat to us arriving and switches the radiators on when we are there. I created a group of all 3 plugs.  There are weekends we are not up at holiday home and don't want to waste energy heating the home those weekends.  

I created a kasa "group" of all 3 plugs and thought that by switching the group on/off this would provide an override to the schedules of each plug - but it doesn't, the schedule still kicks in on Friday even though the group was switched off.  

The only way to stop the schedule from kicking in on the weekends we are planning to be at the holiday home is to go into each smartplug via the kasa app, go to schedule and toggle the off switch for each schedule setting (so 3 plugs x 4 settings = 12 actions plus navigation).

My question for any interested people out there is:

- is there any other functionality within the Kasa app that would allow me to switch off all schedules for all 3 plugs in a group with one action (scene, smart action etc).  Away mode doesn't cut it as it switches things on radonmly)

- OR is there an IFTTT command I could use to replicate the 12 actions to switch off each schedule for each plug - using something like an alexa app command?  There doesn't seem to be an IFTTT option to use a kasa app action (like switching off the group) that could trigger the switching off of all schedules.

Any help much appreciated!