I flew from the UK to Dubnica ( 5 miles from Trencin) in August this year. They had Avgas at both airfields.
We stopped at Lydd for duty free fuel then Koblenz, Karlovy Vary and Dubnica.
Took about 5hrs in a 130kt machine. All very easy. We had to drop down to 800ft in a couple of places to go under controlled airspace as we couldn't get clearances.
Koblenz has a nice Greek restaurant on the airfield.
Stopped overnight at Karlovy Vary. there is a nice hotel near the airport with a shuttle.
On the other hand it is only 50 miles from Brno and Wizzair fly there from Luton very cheaply.