You might want to look at an ECE of a 200k event, either by riding through the night before the start, or continuing on and riding an additional 100k after the finish. ECE gives you an awful lot of choice and the org @Martin Malins is very helpful. You might be able to do it from your own front door, which eradicates all that train faffage and need for a hotel etc.
It can work well for an event on a Sunday, when the trains do not start until too late, you can ride from home, do the ECE and get a train home. It takes a bit of planning but is quite do-able.
I have ECE'd an El Supremo event, and was able to stuff my face before the final 30k run home. Also ECE'd a Fairies 200k by adding 100k before the start. ECE is a great idea, I am surprised many more Auks don't use it.