No problem
For museums, i love the Airbornemuseum in Oosterbeek. Great to see old that happend during the WW2, especially operation market garden wich we still remember every year. Paratroopers from England still go to our match every year and we honour them as we should. Maybe going to the openluchtmuseum (open air museum) that's also pretty good. The korenmarkt itself isnt big and i dont know what will be opened on matchday. I noticed someone saying its StudentNight on thursdays. That just means drinks will be cheaper. Clubs are always opened on thursdays evenings and some in the afternoon. (I even noticed someone hoped for platic furnuture to probably smash around, bad idea, camera's everywhere and you wont find alot die hard Vitessefans there).
There is a bus going to the stadium (bus 7 and 331 if im not mistaken) and leaves every 15minutes or something. On the other hand, i wouldnt know why you would go to the stadium, as there is absolutely nothing to do before the match. Busses leave from central station to Gelredome 2hours before the match starts. Its like 5 euro's and you can buy a ticket on the bus. If you cant find anything, the station has alot of NS employers who can point you to the right direction. Seriously 92% of all dutch people speak English, so dont be affraid to talk to them, just be polite when you do ^-^. A helpful site would be http://www.9292OV.nl or the app from NS. 9292OV.nl is a site where you can find wich bus goes where and the NS app tells you wich track, wich train goes where. Especially for the ones heading to Amsterdam. Last train leaves at midnight!
As far as I know, we dont have any local beers. And if so, its not famous at all. I love Hertog Jan, but hey, matter of taste.
And Damn... Poffertjes. I seriously do not know where you can buy those. Maybe even at the Open air museum.
Important. If you are going to buy tickets for the home stand. Take West-stand. Its the one with the least amount of fans and a lot of businessmen. We have a capacity of 24.500. I will not be sold out, as it is never sold out. Our stadium is to big for the fans that we have. We have a very solid core of 15.000 fans and alot of them will be on holiday. So if we reach like 15k fans total, i would be surprised.
The only thing Southampton could do, is ask Vitesse if its possible to get the entire North stand. That would mean you get around 4k tickets.
If any more questions pop up, dont hestitate to ask
Regards