Hikes around the Florida Panhandle?

If you are wanting trails specifically this is what I found (this is the site I use)

You can also find state parks to hike on that site as well.

Not the best list, but a good starting point

The biggest challenge would be to stay on the trail which is difficult enough in daylight.I would do it with a full moon where a small light or headlamp would be needed but I actually prefer to rely on the natural light as much as possible.And psychological going through wet swamps and creek beds.But,definitely challenging.I have done such a hike in Big Cypress which has similar habitat and was definitely one of my more memorable trips.I actually got turned around in a dark strand and wandered around in knee deep water for awhile before I set up my tent in a semi-dry spot only to realize the next morning I was right next to the trail just didn't realize it in the dark.

Now that the Everglades are leveed off and the water flows unpredictable the gators for the most part have taken to the levee canals where all the birds/fish also are.On that hike I saw numerous gators and wading birds around the canal along Loop Road as I rode my bike,but along the trail no gators and only a few birds.There are a lot of cottonmouths though but the water is their habitat so they can easily avoid you.Most alarming is to encounter one ,at dusk in semi-dry areas with a lot of ground cover blocking quick escape,as that is when they are out and in that situation coiled with fangs exposed.The key is to keep alert but I do jump at such sights,with good reason.They want to avoid you just as much as you want to avoid them.

I forgot to mention that the Ocala National Forest is a fun place to night hike.I did an out and back of the FT there(120 miles round trip)in a week utilizing significant night hiking.This was part of a bike tour where I went on up to Bradwell Bay ,in the Apalachicola NF, after that.

My favorite areas night hiking there were passing by Buck Lake where I could hear a symphony of night noises from miles away,and Hopkins Prairie an open, wet prairie that would probably meet your requirements of wide open(though winter is a better hiking season than summer, for most).I night hiked halfway through the prairie and then set up right off the trail.Next morning,it was amazing waking up right on the vast,scenic prairie.

Most of my experience has already been mentioned, but here it is---

Torreya is great. There are two interlocking loops. The Challenge loop is fine if you need it for distance, but scenery on the other more popular loop is better. The park road bisects the popular loop and rwtb123 makes a good point that you never really feel like you're "out there" because of the many side trails that hit the loop. The park staff is great (particularly Anna). The backcountry sites get used a lot and it's best to get a reservation ahead. Rock Creek sites are nice. The sites on the river bluff are nice too, but were windy when I was there. Expect dayhikers and company at camping areas on weekends. This would be a good place for an adventurous beginner, but I think they have rules against night hiking.

I hit St Joseph Peninsula State Park about once a year. There is no freshwater on this hike, so you have to carry it in. Trail is an old sandy military road (closed to vehicles except park patrols). There is a bay on the east side of the peninsula and the gulf on the west---side trails here and there give access to the bay & gulf. You can walk in 5 miles to a site near the gulf side or about 6 miles to a site on the bay side. From either of those sites, you can walk a loop around the tip of the peninsula with nice gulf and bay views. There are campsites closer in (mile or so in on both bay side and gulf side), but I do the whole thing. There is scrub and very high dunes, so going off trail except along the water would be tough.

Ocala area of Florida Trail is amazing. I like starting at Juniper Springs Recreation Area and heading north on FT. Definitely a winter hike. Finding water you can reach to filter can be dicey on Hopkins Prairie. Last time I was on Hopkins Prairie, there was lots of bear footprints and scat. If you're looking for open areas, Juniper Prairie/Hopkins Prairie will be worth the drive---even if you just stayed near Hidden Pond. You could do a nice two-nighter there by hiking in to Hidden Pond on first day. Dayhike out and back as far as you want on second day, then return to camp that night. You'll find great wide open area a little trail north of Hidden Pond.