In reply to dking02:
> getting a train to a 4000 and going up wildcamping and coming back over about 3/4 days. Im guessing it would be foolish of me to attempt Ben Nevis or other of the like on my own
It depends very much on the weather, and your ability to deal with it if it's poor. And on your fitness, of course!
If you get a settled good spell, there's no reason you couldn't get all nine of the 4000-footers done over 4 days using public transport; if it's storms and blizzards it might be a bad idea to do any of them. In October, it could easily do either of these things.
The Western group of 4000-footers is probably more forgiving in mixed weather, so perhaps plan to head to Fort William and see what it's like, with several plans ready for what to do in different circumstances? You'd do well to have fall-back options, in case smaller hills make more sense at the time, so that you still get something worthwhile out of the trip. Maybe have a look at things you can do from bothies, too - they can be more pleasant than camping.