My inlaws live in Largo just a block off the Trail, so I've been up and down most of it more times than I can count. It's a terrific trail. Do be careful at some of the at-grade crossings though, 'cause you never know what the old guys in the Sedan DeVilles are gonna do!
If you're going to go clear to DeSoto, be careful and pay attention to the road signs! I wasn't paying attention, and got lost in downtown StPete one fine August afternoon, and my 20 miles to DeSoto turned into
30 miles, two flats, no water, and an excruciating sunburn!
Seriously, though, if you can find your way across one of the causeways out onto Gulf Blvd, there's a marvelous place called The Frog Pond, that serves heavy-caliber magnum breakfasts. MOST worth it. For later in the day, where Ulmerton/Walsingham (SR 688) runs into Gulf Blvd there's a joint called PJ's Oyster Bar that serves up great cheap seafood. Warning, the locals pack the place early, so expect a wait.