I have really bad knee/leg problems and I would love to be able to go to places to see the birds, but I just can't walk that much. I have a mobility scooter for around the house, but would need a much more heavy-duty one for nature trails. The best ones are extremely heavy and all one piece. The other ones can come apart in sections and fit in the car better and are easier to deal with. Just curious if anyone has one that they are happy with at places like state parks,etc.? Thanks!