That’s a very good cause 
It would be very interesting to hear afterwards how you got on.
Flying IFR in Poland was easy, and the flight was issue free the entire time. We spent 8.5 hrs @FL100 and I wish had taken my mountain high device with me, but that’s got nothing to do with the country ;). Flight time from EDLN to EPRZ was 4hrs, back 4.5 hrs, and I chose to fly IFR the whole time to make it easy.
We delivered medical goods, ca 150kg, for a specific hospital in UA, and took back with us a challenged boy with his companion who just days before survived Russian artillery. Overall a very successful mission. Thanks also to https://www.ukraine-air-rescue.de/
On arrival in Rzeszow we needed a steep descent, but with gear down no problem. There are patriot systems ready to fire, direction East, along the runway.
