Hi Tony
We carry a 650 kawasaki as you can see and for us this is perfect, we have a tank bag and a back box on the bike and then a backpack this is sufficient for all our needs. Also our RV is big enough to carry but if not I would use a trailer but have a much bigger bike FJR or Goldwing type bike.
I would agree with Papa Smurf though bikes are not for everyone and riding on our roads today can be quite daunting and needs tremendous concentration. If you have got a full bike licence but have not ridden for a few years go and do a refresher course they are great fun and could save your life and cost very little. If you have not passed a test you will need to book in for training which will include a CBT (compulsory basic training) first which if you're over 21 will allow you to ride up to 125cc but no pillion. You can do the CBT part in 1 day normally and then decide if its for you or not. If you want more info on training pm me and I'll send you some details as I am a part time motorcycle instructor and raced bikes for 14 years. Make sure you train with a reputable company as there are a lot of cowboys out there.
If you do decide to go for a bike consider a modern scooter as they are much more comfortable than traditional bikes and the new ones are superb to ride especially with pillions who are not into bikes. The only drawback with sooters is the weight they tend to be heavier than traditional bikes we looked at a 400cc and it weighed 250kgs our 650 weighs 180kgs.
Hope this helps a little and if you decide to go for a bike and need some help I'll help if you want me to.