Go to Highland, I did mine there in 4.5 days. ILS, VOR/DME, all the other nav aids available locally. Fantastic......
Peter Brookes is a great instructor and you can do it in a PA28 or C172.
Weather is important because you will have local minimum heights to deal with wherever you do it but thankfully the WX up there is generally better than rest of uk for flying hours.
If you can be bothered just check wx stats online and you`ll see.