The VRG school is similar to the EMRA school.
If you have a seat, you can take an instructor along. If not, you do "lead-follows". Both ways work fine if you have a good classroom session mixed in.
I've taught at EMRA race schools and was the RaceChair of that organization for a while. VRG has always had excellent classroom sessions. EMRA was weak in the classroom area, but they have a new Chief Instructor who is a good guy. I expect he will probably improve the classroom quality of their schools.
I just talked to the president of VRG and he said they *may* allow cars with flares to run "conditionally". That is: you could try out an event with VRG to see if you like the group without changing your flares. If you like the group, then next time, they'd want you to have normal-sized fenders. This is not official, but he's trying to get the VRG Board to accept the idea.
When Scott ran with EMRA, there was just one other British sports car to run with if he was lucky......almost all the cars he ran with were Hondas, Golfs, etc. I know. I ran into the same thing with EMRA. Even this past weekend, with a very small turnout due to weather, I had 6 other Sprites and Spitfires to play with. On a normal vintage weekend, I'd have close to 20 similar cars to run with. Makes it much more fun.