I made that trip this year and enjoyed it very much. The
route will depend on the winds. We had northerly winds the whole time. Because having the
wind on the nose makes such slow progress (VMG) we had to use the
engine a lot in the Irish Sea to reach tidal gates on time, and also to escape an approaching bad weather period. I imagine that with strong westerly winds you would choose a
route closer to the Irish coast, and with strong easterlies go closer to Wales.
One possibility is to go quickly to
Scotland after rounding Lands End and use the rest of the available time to enjoy sailing there. Many interesting places and great scenery.
The weather can be really cold and windy up there and it may be that the
heater on the
boat is not available without
shore power. Warm clothes and most importantly a very good sleeping bag are needed.
I tried to use my off-watch time to make sure I get enough sleep. I put ear plugs on and slept whenever I could before and after a night shift. For me that worked well when we kept on going for three days. Some others kept going with far less sleep, obviously depends on the person. The
skipper likely decides which watch system to use based on the route and the crew, and the crew just accepts that.
If you can, study the Reeds Almanac and the tidal gates (All the way from
West Coast to Scotland) beforehand. Practice at home making a couple of
passage plans covering more than one day. Then you learn the most when the skipper makes you do the same and advises you how he would like it to be done. I can tell that the instruction (lessons) given to us was first class - how to make simple and effective plans where to go and when, given the strong tidal flows near the coasts.