I don't think you'll have any problem at all. I tow a 15' sailboat that weights about 1k lbs with my Golf TDI (6MT, 02m transmission, FWD), and it goes up the steepest ramps effortlessly with zero slipping.
I have ASR/EDL but it has never activated once on a boat ramp... boat ramps are unlikely to be wet and slippery as high up as the front wheels unless you are launching into heavy surf or something.
Having towed a lot of boats with small 2wd cars, traction only really starts to be a problem when the weight of the boat is about double the weight on the drive axle. For example, my MKIV golf is about 2994lbs*0.6=1796.4 lbs of weight on the front wheels, so not much chance of slipping pulling a 1,000 lb trailer up a ramp. OTOH, I've towed a much bigger 21' sailboat (3000 lbs) with a Volvo 740 (RWD) that has only 1340 lbs on the rear wheels, and it did experience slipping on some of the steepest and smoothest ramps, however it was still pretty manageable and never got stuck.
So I think a Golf would experience some slipping pulling boats up that were over 3600 lbs, however that is well in excess of the towing capacity of the vehicle.