Multiple pension pots - small one with protected pension age
I've got a few pension pots, including small one with a protected pension age. I'm about 17 years from that age and it only contains about 18 months of expenses.
I'm contributing to other pensions now with lower fees, but obviously those ages are higher and potentially going up further. I've just been ignoring it for years but I'm unsure what to do. Should I pay more in now incase it gets closed for more payments in? The fees aren't great and I'm handling everything right now with salary sacrifice because that's simpler. Could I do some kind of partial transfer to put a bit more in so it covers the difference in the years I can access?
Or should I just plan to wait until a couple of years before, throw a lump sum in and then nearly immediately start to withdraw it?
Thanks