Having some experience in this area I'll say unless the chair is regular height (like some you might see under sunshades for example) be sure it has arms that are sturdy or none at all, not the fabric sort, so she can get herself out of it. I really liked our sand chairs with wooden arms (back-pack style) but was also quite comfortable in the all wooden ones some campmates have like
this (just an example, you can get them cheaper I'm sure).
Back at camp something she can get her feet up with will be sweet.