We have stayed in Seget Donji, just to the West of Trogir for three years, the last two at the excellent Apartmenti-G. We have already been to Krka twice and therefore did not visit there again although it is always worth a visit. This time we went to Omis, which is an attractive town, and also an interesting drive up into the mountains above - not for the faint hearted! We didn't go rafting as there are limited trips at this time of year but it looked like something to try another time. Another day we drove inland and took the northern road aroung Peruca Lake. A road in name only much is gravel, but great views and well off the beaten track (the woods are still mined from the Homelands War)- that took us to Knin. Wonderfull fortress and superb views of the Krka gorge.
Costs have certainly gone up in Croatia and it is not as cheap as it was two years ago but it is still good value. We found Trogir to be busier than we have found it in the past and the locals have caught on, you used to be able to park over the bridge from Trogir for free, but this year they charge 10 Kuna per day. It isn't much but after you haven't paid at all..! Parking at the car parks on the mainland is 6 kn per hour, and for a short stay - a quick shop - are better value.
There is a new Lidl near the airport, and if you have a car, and are self-catering a good place to go, with plenty of parking. The fish market and fruit market are as good as ever.
We intend to return, but unless the exchange rate between sterling/Kuna improves then we will have to be a bit more careful with the budget! Two years ago lunch for 2 was about £10-12, this year £15+