I went several times in the early 90's, but was living fairly close.
Get the most expensive tickets you can afford, because its pretty much a crush. Avoid the cheapest tickets as the only race you'll see is a bit of the national. Its probably bette nowadays with tv screens, etc though.
I would try to stay in liverpool, as all routes will be congested.
I suggest you get a taxi to the racecourse and get their early.
Their is a train station opposite the racecourse as well, which can be used.