Get the train into Man vic and use the tram service to Weaste which is all of about 2 mins from the ground.

Oh, or catch the train to Walkden and catch the number 68 bus to Hope Hospital which is about a 10 minute walk from the ground. Just ask the locals who despite what you might hear are a pretty friendly bunch.
Much friendlier than some of the good folk of Platt Bridge say...

Oh, I presume you're travelling to Salford from Wigan, right?

yep i am. thanks a lot for that mate. I lived on the height for a couple of years and the only way i could think of how to get there was really long winded without a car so a big thumbs up for you

or the 33 from wigan, think that goes near dont it?

Doesn't run from Wigan on Sundays matey. (Dear lord. I'm starting to look really sad here. Best explain my public transport knowledge between Salford and Wigan. Tis simples really. I work in Wigan on most Fridays hence getting to Salford from Wigan to Salford is a regular occurance.) (Hopefully I have some credibility again. :s)

Just to boost your credibility slightly, there are no trains on the Walkden line from Wigan on Sundays.

Very good point Karlos. Of course.
Erm, plan A for the Wigan fans then. Train from Wigan to Man Vic via Bolton and catch the tram to Weaste from Piccadilly Gardens.

Or a train to Manchester Picadilly then an Eccles tram to Weaste.

Hmm. I don't think the trains from Wigan go to Man Pic matey. I've been wrong before though! (Once...)

coming to your ground on sunday on the 33 bus service leaves wigan 13-00 hrs 16 50- back

so does the 33 run on Sundays
why no trains on a Sunday for Swinton/Walkden
Train to Salford Crescent from wigan either change there and train to Piccadilly then tram
or get the Bus 67, 100 to the top of Weaste lane alternative routes

Just had a look and trains are running from Wallgate to Piccadilly on Sunday.