Hi Loopylou.
I only did two excursions when I was there, The wine tasting and a lake cruise. They were worth doing I Would say, Even if it is to see what Bulgarian life is like. I have not decided as yet if I Will encounter any excursions as yet. I shall wait until at the resort.
You can get around on bus with the bus stop very close to the hotel, And is very cheap. And you can get buses into Sunny Beach and to Nessebar. Nessebar is also within walking distance if nice.
The hotel complex where we are staying have about a dozen taxis with the Hotel logo on them. And there is a price list by the hotel reception giving destination and prices. However please be careful if you go into one of the towns, Always ask how much the taxi fare will be to the hotel.Before getting in the cab! As the taxis in town will not display the hotel logo. And could well rip you off once at the hotel. Also if possible try and fill the taxi up, e.g 4 people if possible.
I hope this wont make you apprehensive. As it will be fine. It is a pretty decent place, With the hotel staff very helpful and friendly.
You will have a blast
All the best
Andy