caravan aerials

[prg1]

We have had our caravan for 5 years and never bothered with a TV however, now we are looking at a seasonal pitch.
Given we will be using the caravan more we are going to get a TV.
What do you think, Omni aerial, or an aerial on a pole?

[prg1]

I was thinking of going for the jockey wheel one. See an awful lot around the sites we have been at.
They can't all be wrong.
Thanks