Getting 2 redemption seats in F is not easy but possible and even more chances in 2 J seats.
Your only constrain is to allow decent time to book hotels but there are lots of hotel choices & lots of booking website allow you to book even in the last minute booking!
You may start with planning your route & dates, then think of the alternatives & avoid the peak time like in July summer holidays, make your booking even if no seats available yet & you can on waiting list. Good luck!