Travel Package Website

I require to add functionality to my website that will allow me to sell package holidays.

The site would have a search function whereby customers can search for resort, type of accommodation, number in group or arrival date. (There are only around 12 resorts and maybe 3 or 4 accommodation options within each reasort).

Once the customer find suitable accommodation they should then be able to buy that item using online shopping cart and the inventory depleted accordingly.

Ideally this should be able to integrate to my exisiting website.

I must be able to update the content, add new resorts, change pricing etc very easily.