Hello Richard.

I was at garda last year. i didnt fish but was at a few tackle shops.
tackle shop in garda is at the waterfront beside the market
there is one in bardolino, quite small, tackle only (i think)
The theme for coarse fishing was using big wagglers (25gm ie. Ireland).
I could get maggots & groundbait.

Tackle was V. good value. Worth bringing some back home !!

Regarding fishing there is pike, tench & a few raoch/rudd types of
silverfish & trout etc...

I hope this helps tight lines !!!