I haven't stayed on either Twenty Shilling Wood or West Lodge in Comrie, but I do visit the town regularly and know a little about the sites.

Twenty Shilling Wood is about half a mile outside Comrie, surrounded by trees (as the name suggests!). The site seems to have good facilities and has a friendly atmosphere - reminds me of campsites in France.

West Lodge is on the edge of the town - within easy walking distance of all of the shops. The site has very few trees, so the caravan pitches are quite open.

Hope this helps.