Our hospital has CCU, ICU, and CV-ICU plus 2 tele step down units and an interventional CV-care unit; so those of us in the critical care units float to those units only. It is very rare that a tele nurse floats to my unit (CV-ICU), but it does happen at times and we try to give them the stablest patients we have. We also have remote tele in our hospital, but I know nothing about that!
I have the utmost respect for any nurse who can juggle more than 2 or 3 patients-- I recently read somewhere that med-surg IS a SPECIALTY and should be considered as such instead of being thought of as the training grounds for specialty or "real" nursing (I'm not kidding; that's what the article said!).
Many years ago (>13!) I had to float to ortho and came out of report scared silly! I told the nurses that the only thing I knew about anything on that floor was the code cart! Those nurses were so kind to me that whenever it was time to turn or move my patients, they came in and did it for me! It was probably the safest thing for those poor patients, too!