Advice needed please!

Help! I am considering buying a 24/25 foot long tourer - first caravan - I'm not really too bothered about the size myself but wondered am I likely to encounter many problems when it comes to booking pitches/sites etc....it seems that there are some sites out there who won't/don't cater for the larger vans.....I would really appreciate any views on this before I commit to such a large purchase/van.

Thanks - hope to hear from someone/anyone real soon as I may be buying one in the next couple of days!!