South Cornwall driving routes

[Thomas-the-Terrano2]

Hi,
So its 14 years since we last towed to Cornwall, well just stating at Looe so sure used
the A38 and Tamar bridge route from the M5.

Am sure even in mid 90s we when drove solo to Newquay that some of the A30 over
Dartmoor has been dual'd and maybe when had a day trip from Looe to Nequay in
2014 though more road that way had been improved.

So, looking at taking tin tent to Mevagissey way in summer.

Google mapping suggests A30 just beyond Bodmin, then onto A391 to A390.

So what off the A38 these days, onto A390 just after Liskeard? Have there been
any improvements to the 38 west of the Tamar bridge which I seem to recall being
just a single carriageway almost straight off the bridge.

tia