Nice!
In the above picture, the large island is called Cebeco. On the tip or point of that island, which can be seen in your picture, is some of the best fishing in the whole area. I have knocked em' dead out there including a 45lb Wahoo, tons of Yellow Fin and the boatman speared a 75lb Red Snapper! There is also seculded beaches out there and secret surf spots. It is well worth a day trip out there. Ask around town, many boat captains will run you out there and take you fishing or whatever. I recommend Babalou though.
If you are up for some big adventure the bone yard on the way back to Sona is worth a visit, just follow your nose!
There is cheaper camping in Catalina, just a year ago Oasis was only $5 a night. Plus if you are on the town side of the river you don't have to deal with the tides. Rosalee (ask around town) will rent you a spot in her yard for well under $10/night.
Make sure and have dinner at No Worries one night, Alex & Juan-Carlos make the best and cheapest food in town.
.75 cent beers every day from 4-6pm at the Dive Stop, say hi to my good friends Glenn, Julie & Ben if you stop in. They also opperate the best dive shop in town which is right next door.
If you are into yoga, my friend Michele at La Buena Vida does classes, iirc Friday mornings on the beach. Their yoga deck is well worth a look and they have the best breakfast in town. Free wifi also available at La Buena Vida.
Across the street from La Buena Vida is the Library, in the same building is the bakery. Some excellent baked goods available here and well worth a stop one morning.
You really should go out to Isla Coiba. Any one who is in the area and skips out on seeing Coiba is well, missing out on much more than I can describe.
If you are an experienced surfer make sure and hit up The Point.
When you leave Catalina and get back to Sona. A very very cool drive through rural Panama is from Sona to the CA1 west. You just leave Sona west instead of heading for Santiago. After awhile the road will fork, stay left and do not head for Las Palmas. It is a really beautiful drive that takes a couple of hours. There is also plenty of places to camp along the road and along rivers too. Oh and the best rotisserie chicken I have ever had is in Sona. You can't miss it, half way through town on your right. $6 for a whole chicken!
A trip up to Santa Fe almost due north of Catalina/Santiago is well worht a few days. It is basically Boquete 20-30yrs ago. Ask around Catalina for more info.
The farmers market in Santiago is worth a stop if you like fresh fruits and veggies.
If you are in Panama for more than a month you can re-new your truck permit in Divisa instead of having to deal with Panama City. The aduana in Divisa is super mellow and takes about 15mins to get done. It is right on the CA-1 and you can't miss the offices.
My name is Ian, I just spent 3 months living in Catalina. You are welcome to toss my name around but I doubt it will get you any discounts, favors maybe, discounts unlikely!