We have stayed three different times at the Havasu Falls RV Resort, very handy to the I95 in town. It is a PA campground so one night was always half price. For us it was usually on the way to or from Quartzsite, so it gave us a chance to properly clean up. The park was clean and well run. Sites were narrow but adequate. There were several restaurants within walking distance and we usually enjoyed our meals. As far as things to do, I can't help you. I know the London Bridge is a tourist attraction, but It did not interest us. There is a Hot air balloon festival that coincided with our forum rally at Quartzsite. We took that in twice, but only as a day trip from the rally. The Park was about $44 a nite so 2 nites averaged $33 with the PA discount. There were no activities in the park, at least nothing that interested us.
Hope this helps.
Dave