Firstly, congrats on acceptance to Purdue - good school.
I grew up in Lafayette, just across the river. Lafayette has one Microbrewery, the Lafayette Brewing Co., located at about 6th and Main. Basically the only good beer in town (on the Lafayette side at least, I tend to avoid the college bars).
As for LHBS, there are none to my knowledge. The closest is probably in Indianapolis or so, an hour away.
I never drank much in West Lafayette mostly because I hate driving home drunk to my parents house...
I'd say get used to mail ordering your suppliels and dig deep for some more good places to drink.
On the up side, there's a homebrew club that includes that area and if you can get in good with them, maybe they'll take you shopping when they run out for supplies. Good luck and enjoy the midwest...
kvh