Just about all of my early "voyages" were two smoke tours. Mostly Japanese machinery (exceptions were a Lambretta scooter and an early 250 MZ) and ranging from a TS100 Suzuki trailie up to a T500 Suzuki. Many of them were two up and loaded down. 175cc is plenty for solo travel - I've been to eastern Europe on 100cc and seriously considered going two up to Greece on a 125cc Yamaha. Below are a few of the things that need to come further up your priority list if you're new to 2Ts -

Don't push it too hard - particularly if it's Brit tech. Full throttle up a hill loaded down on a hot day is a recipe for piston seizure, even with the right amount of oil, correct timing etc. They do give out warning signs that disaster is close but without 2T experience you may not pick up on them. Lightning reactions to pull the clutch in is normal two stroke practice. I still do this even on my 4T bikes when things don't feel right; old habits die hard !

2T oil used to be everywhere but not these days so, as others have said, you'll have to use car oil. Plug whiskering is said to be the downside but I hardly ever had it. When it did happen it was usually when the engine was idling, very rarely on the open road. Mostly it was on the bikes with the more marginal ignition systems (magneto rather than battery / coil)

Our Jap 2Ts were very prone to ignition timing problems (old skool points wear). Too advanced and you'd hole a piston (never had it happen on a road bike, only on the track), retarded and the engine lost power. I spent many a happy hour in campsites reading plugs and checking timing. Bantams may not be quite so critical but it's still not something to ignore.

The above makes 2Ts sound like a marginal technology not really suited to distance riding but it's not true mostly, it's just that they have a number of weak points (or the 60s / 70's ones do anyway) that you need to keep an eye on. On the up side they are great fun to ride (may not be applicable to a Bantam ) and all other things being equal put out more power than an equivalent 4T.