If the noise increases when turning left, I would suspect the right front bearing. If the 3rd. gen. vans are anything like the 2nd. gen. vans, the bearings are not all that difficult to replace. I've done this on my 92 & 94 Caravans. Just time and ordinary hand tools are required. Good time to replace brake pads if they are getting thin as you have to remove the calipers to R&R the bearings. Just my $0.02.
FredB
FredB