Weston
The arrivals will be radar vectored to the VOR approach if it is working, if not it is a cloud break to visual. Dublin radar are good but be careful about being kept high, especially on the easterly runway.
Departures are straightforward if you talk to the tower controller before.
I had all the same concerns as you before I went there but careful preparation made it straightforward.
If you want to chat on the telephone then PM me.
With regards to the FPL; read the UK flight planing guide (CAP 694) and the UK AIP RNAV section and they tell you exactly how to file your flight plan making it clear you are not RNAV and require special handling, like do not put an 's' in the equipment box.
Regards
MM