Riding over winter, what would you do? Which bike on trainer?

[u/OutsideAtmosphere-14]

Howdy. Winter is coming and I’m deciding how to best train the bike (yes I’m I the southern hemisphere). I really dislike taking my TT bike on and off the trainer, so I’m trying to avoid doing as much as possible, but will need to ride it outside at some point to avoid losing skill.

 

The facts.

-          My A race is in October (first full IM).

-          B race is in September (really a prep for A race).

-          I have three bikes. My TT, a newer road bike mostly used outside (e.g. group rides), and an older road bike that currently lives on the trainer.

 

I’m conscious I need to build up my ability to stay aero for longer, so I’m considering having the TT live on the trainer over winter. I’ll still be doing some long rides outside, but they will mostly be with other people or in situations I’m less likely to be down in aero for long periods. I might take it off a few weeks before the B race. Does this sound like an OK approach?

 

Or what would you do with this mix of bikes and dislike of swapping which bike is on the trainer as it's seriously a PITA?