We've just done ours for toxoplasmosis and chlamydia. TBH, we've never bothered before, but we've started showing them so they're out and about a bit, so better safe than sorry. We also got the offer of the spare doses from a friend

. Both toxo and chlamydia cause abortion in sheep; vaccination has to be at least four weeks before the tups go out. However, if you have a closed flock, away from other sheep and don't have any problem with abortion, I wouldn't bother personally.
Ours are on Heptavac P Plus programme, but the annual booster for that is 4-6 weeks before lambing, not at tupping.
We always fluke ours at this time of year and test for worms and worm if required. The only time we routinely worm is at lambing time. If you can subdivide the 2 acres into four small paddocks it would probably render wormer redundant as you'd be able to rotate your grazing.
Ours have rock salt and a yellow Rockie all the time and I give them a Crystalyx Standard over winter. I'm going to give them a bit of bagged feed in the two weeks before the tup goes out, while he's out and for a couple of weeks after, but they're on really crap grazing just now.
For the six weeks before lambing, I give the ewes scanned with twins some bagged feed as well - but I won't be feeding the ones with singles in the hope of avoiding any C sections next year.
Don't forget your tup's health too - he's half the flock. Especially his back feet - if he's not comfy on his back feet, he'll be less keen to work.
HTH