I've been to most of the races , over the years. My personal favourites are Tandragee ( which is a May meeting ) and the Armoy. This year I'll be heading over for the Cookstown 100 next week, a few days touring on the bike, then onto Tandragee. I get there a few days early to help with the setting up, beers with a few folks in the paddock etc. The beauty for me, is that I park the bike on the inside of the circuit, and from there, througout the day I can ride and access 3 different parts of the circuit using the small lanes within the circuit.
As has been mentioned the UGP is very very good ,