Another vote for Smidge as a repellent.
However, for things like ticks, the problem is that unless you spray our whole body with repellent, they will still get onto your clothes and crawl until they find somewhere nice and soft and warm
If in a particularly "ticky" area, I keep my trousers tucked into my socks. This seems to work fairly well, as in recent trips though I've seen more ticks, the last few on me have been on my wrists (probably from sorting out kit on a wild camp, or whilst portaging (=dragging) the canoe up some stupid slope!)
Ticks are often found in low lying areas where deer may have gathered, small paths on the approach through bracken/long grass, and other similar places. I pay even more attention then.
I'm normally only in Scotland when its cold enough to be wearing long trousers and in fact, normally base layers underneath! I still get the odd one of two on Easter trips, and a regime of checking yourself each evening is necessary on a multi-day trip.I use the O'Tom Tick Twisters.
I hate the little tickers, but you can't over worry about it or you'd never go out.