I can fully go with your sentiments, Mark A. It is an issue that I have fallen foul of in the local winter night street league ( urban orienteering).
Another tactic, which perhaps contradicts an earlier post, if you are going for a distant high scoring C.P. then leave a couple of low scoring one's that are handy to the event centre. If you are heading back with a few minutes to spare, these low scores can be picked up as bonus points.