Summer Holidays - Where to go? What to do?

So we are starting to finalise our summer holiday and I think Wales is going to come out on top.
We are going to go on a week long rally but with electric hook-up.
The rates for rallies are very reasonable and if you get a hook-up as well then it makes for a holiday that doesn't cost the earth.
Most rallies need you to pre-book a ehu and pay a small deposit.
If you don't need ehu then you can just turn up.
 .....Update.......
We've sent our deposit off and we are heading to Anglesey for a week on a proper campsite but not paying the sites full prices, because we are going as part of a district association. This means that the DA has negotiated a cheaper price to rent a field and we then sub rent off the DA and it makes for a much cheaper holiday.
Hopefully our friends are coming along as well and this is always a good idea. We can spend nights and days in each others' company and share the ideas for what to do and where to go.

Let me know in the comments below if you are planning on going to Wales for your main holiday this year.