Brook Lodge is very near to Bristol. I would go down Brockley Coombe, just after the airport. That takes you to the A370 and it's a much better route into Bristol. That goes right past the Ashton Park & Ride which will drop you in the middle of town, with no parking problems.
If you want to meet up in March, drop us a PM and we'll show you around the docks area. All of the Docks area is in Parking Zones now, which makes short term parking for visitors much easier. All day parking is difficult, but up to 4 hours is quite easy. Best wishes Simon