I don't know much about the Lower Wolf around Fremont...but if it's anything like the Upper Wolf...you're going to see lots of rocks and fast changes in depth.
Speaking honestly...the only boats I would use would be a canoe or a jon.
There's a paved launch just north of Fremont in Mukwa...just south of south of New London. Here's the DNR page about it...
http://dnrmaps.wisconsin.gov/imf/ex...strID=2228Chances are you will have to Copy & Paste that link...as we've been having a difficult time with links on here

You might also consider giving the area DNR office a call...and try to find someone with knowledge of the area

Here's general bag limits for fish...but you may want to take a look in the regulations...as many areas have special limits.
http://dnr.wi.gov/topic/fishing/dailybag.html
Here's a page for various .pdf files of this year's regs...
http://dnr.wi.gov/topic/fishing/hookline.html
ALL the pdf's are the same on that page (d'oh!)

see page 70 of it for "Winnebago System Waters"

I did a Google Image Search for "Wolf River" + "Fremont, WI"....here's the results.
http://www.google.com/search?q=%22Wolf+River%22+%2B+%22Fremont,+WI%22&hl=en&lr=&prmd=imvns&source=lnms&tbm=isch&ei=4R2CT6XRA4netgfH_vX1Bw&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CB4Q_AUoAQ&biw=1152&bih=696
This campground is up near that Mukwa launch I mentioned...
http://www.wolfrivertrips.com/wolfrivertrips/home/default.asp
Good luck...& enjoy your trip
