Hi candi,
Well if i'm you i would try to rent a car, because Skaness it's between Sousse and Monastir, and it's a touristic zone, so to get to sousse or Monastir you will need a mean of transportation, if you will rent a car you can move easily between Skaness, Sousse and Monastir, in sousse there's a lot to do, and a lot to see, the medina, Port Kantaoui ... There's a lot of bars and disco if you are interested, and Monastir, it's quiter than sousse, i can say more romantic than sousse, you can to the medina also in Monastir ( very nice to see) you can go to Marina Monastir, very nice harbor, you can visit the Mausoleum of Bourguiba, and the Rebat etcc
A month ago i've been in Monastir, in the Marina of Monastir ( you won't miss it ) there's an old restuarant, from the outside it looks mexican, i've been there 3 times during my last stay in Tunisia, go to the restaurant he has a toooooo nice, delicious food

especially the Mexican Steak ohhhhhh

You gonna like it man
Cheers
Makrem